Green Hill
Somewhere in part of Green Hill, a portal came from out of nowhere, which turns out to be Blaze the Cat and Marine the Raccoon, who has teleported from Sol Dimension to find Sonic in order to figure out something has happened.
Blaze: I think we're here!
Marine: Oh, crikey! Are we too late?
As she starts to look around and seeing nothing but ash on the ground before finding out that Sonic and the others were here but they are off somewhere to find the Avengers.
Marine: Crikey! We've gotta find that bloke, Sonic! He'll know what to do!
Blaze: Let's go!
She leaves to find Sonic and the others, who are off to Wakanda to find the Avengers to resolve this predicament.
Somewhere in the forest, Sonic and his friends are boarding a Resistance battleship off to find the Avengers to solve the vanishing problem.
Amy: Oh, this is going to be the same without Tails around to pilot this thing!
Silver: I don't know who's going to steer the ship?!
All of a sudden, Blaze and Marine arrive to see Sonic again.
Blaze & Marine: (in the distance) Sonic!
Sonic: Hey, Blaze! Hey, Marine! Long time, no see! How are things going?
Marine: Our world became a living catastrophe, half the Coconut Crew disappeared in front of me!
Cheese: (concerned) Chao Chao!
Marine: Oh, by the way! My name's Marine!
Amy: I'm Amy!
Silver: Silver!
Jet: Jet!
Big: Big!
Amy: And that's Cheese!
Cheese: Chao!
Marine: Sonic, what happened to that bloke, Tails?
Sonic: He vanished right in front of me. And I couldn't even save him.
Silver: We've also heard about the Mad Titan called Thanos used the Infinity Gauntlet that has the stones and wiped out half of the entire population.
Big: He took away my pal, Froggy.
Jet: He killed both Wave and Storm.
Cheese: (angry) Chao chao chao chao!
Blaze: What's Cheese saying?
Silver: Cheese said the purple guy killed Cream! And now he's going to pay for it! And my future is in ruins yet again.
Amy: And the half the Flickie population is gone as well.
Marine: Well, what are we waiting for? Let's go find the Earth's Mightiest Heroes!
Sonic: Off to Wakanda we go!
As soon as they board the ship, except Jet, who has his own. The two ships are ready for take off to their destination, Wakanda.
Elsewhere, in space, Knuckles and his team are heading back to Earth in order to find Sonic and the other about the Thanos situation.
GUN Commander: (on screen) I saw half of the soldiers vanish in front me like it's a living nightmare.
Rouge: And we saw Omega disappear as well.
Vector: Espio and I saw Charmy, Tikal, and half the Wisp population have turned to dust.
Mighty: Ray is gone as well so to speak.
GUN Commander: Unfortunately, I heard that Sonic and the others are heading to Wakanda to find the Avengers about the predicament. And I also heard about the legendary Steve Rogers, who goes by the name Captain America until he got frozen for 70 years. And Bucky Barnes, who was brainwashed by HYDRA and cause mayhem in Washington D.C. to take him down until he got away.
Knuckles: That's odd. Sonic is probably heading to Wakanda to look for the Earth's Mightiest Heroes as long as we meet them there.
Shadow: I heard that Wakanda has a mysterious material called vibranium, which made Captain America's shield.
Rouge: And the country is ruled by T'Challa, who is known as the Black Panther.
Espio: Wakanda is literally technologically advanced, but their city has been concealed for many years.
Vector: Well what are we waiting for? Let's head off to Wakanda!
Knuckles nods before signalling their destination.
Knuckles: Here we go!
Meanwhile in Eggman's base, which is hidden somewhere underwater.
Dr. Eggman: Hohohohoho! Well it looks like that spiky pest Sonic and his friends are going to Wakanda to find the Earth's Mightiest Heroes in order to undo Thanos' big mess.
Orbot: Actually, boss! Wakanda has a mysterious material known as vibranium!
Dr. Eggman: Indeed, Orbot! Since we've been researching some numerous casualties around the world, including the entire universe.
Orbot sighs deeply on how Cubot vanished in front of him. Until Metal Sonic arrives and helps him out.
Metal Sonic: We will gather some vibranium to create robot army.
Dr. Eggman: I guess you're right, Metal Sonic! We're going to create an army of vibranium Eggman Robots to conquer the world. Now let's get going! We're going to Wakanda!
Orbot and Metal Sonic: Yes, Dr. Eggman!
Just as soon as the Egg Carrier emerged from the ocean and headed towards the skies to their destination.
On board the Resistance battleship, Sonic, Marine, Silver, Big, Blaze, Cheese, and Amy. Marine is piloting the battleship as Sonic approached her. Alongside Jet's ship, Jet is piloting near their destination, Wakanda
Sonic: So this must be the where the Avengers are!
Amy: Oh, Wakanda is so technologically advanced. And I wish Tails were here to see this!
Jet: I really wish Wave and Storm would see it as well!
Marine: No need to worry, mates! We're heading a lot faster than we want to.
As the two ships head towards the side of a small mountain. However, instead of crashing, they went through a cloaking field to reveal the Golden City, Wakanda's capital. Some of Team Sonic look in awe.
Cheese: Chao!
Big: What a hidden city they've been hiding their country over the years.
Silver: Technically, there's a ruler who is the king of Wakanda, who is known as T'Challa, a.k.a. the Black Panther, who takes good care of this country from unknown strangers like Ulysses Klaue for example.
Amy: Not until N'Jadaka a.k.a. Erik Killmonger killed him and got into Wakanda to challenge his long lost cousin, T'Challa for the throne and take over the country.
Blaze: Not cool.
Jet: So that's because he wanted T'Challa dead so he can have the throne and mantle of the Black Panther.
Sonic: Yeah that's the reason why his father, N'Jobu died at the hands of his own brother, T'Chaka.
Marine: Well that makes sense. Anyway, we're approaching the drop zone!
As soon as both ships land at a certain location near the unknown part of the section where Shuri attempts to remove the Mind Stone out of Vision's forehead.
Amy: So this is where the Avengers have been in this unique forest!
Sonic: Not to mention half of them disappeared. And there are some numerous bodies where the Outriders have invaded.
Silver: Which also included the Black Order.
Everyone: The Black Order?
Silver: Yes! They are called Corvus Glaive, Proxima Midnight, Ebony Maw, and Cull Obsidian. They're known as the Children of Thanos.
As Jet looks around at the glimpse of the battlefield which was filled with the bodies of the Outriders and the Wakandan army.
Jet: From looks of it! It seems that the Avengers were here earlier while fighting alongside Black Panther and his army.
Sonic: Well it looks like half of the army, including T'Challa had turned to dust.
Everyone is shocked over T'Challa's disappearance.
Amy: Oh, no! He's gone along with his sister, Shuri!
Silver: Plus Shuri was her lab while she was attempting to separate the Mind Stone out of Vision's forehead.
Amy: We all know that their mom is still alive somewhere in the Citadel.
Big: (notices something) Hmm... there's something over there!
As the others look at the glimpse of the Golden City, they awe in amazement.
Blaze & Marine: It's so beautiful!
Sonic: Well it looks like we'll have to split up and find the Avengers. Amy, Jet, and I will look into the forest. Big, you, and Marine will search the city. And Silver, you, Blaze, and Cheese look around for clues.
Silver, Blaze, and Cheese nod before they break into teams and find any luck where the Avengers are somewhere after the battle.
In the Forest Area, Sonic, Amy, and Jet are somehow searching for evidence where the Avengers have left their tracks.
Sonic: Well it looks they've been here in this forest. But for some reason half the team has disappeared.
He noticed one of Steve Rogers' vibranium Wakandan Shields as soon as he picked it up and placed it on his arm. And he sees another one and puts it on.
Amy: Hey, Sonic! Where did you find those shields?
Sonic: When Cap must have dropped them and went back to the city and somewhat left the country without a reason what has happened.
Jet: So that's why his pal, Bucky vanished in front of him and Thor.
Amy: From the look of it. Since T'Challa disappeared in front of Okoye, who was terrified at the moment. M'Baku was watching half the Wakandan army in horror.
Jet: Also Wanda Maximoff, Groot, and Sam Wilson have died as well.
Sonic: Actually, Groot is one of the Guardians of the Galaxy.
Amy: Rocket Raccoon is one of them as well.
Meanwhile with Blaze, Silver, and Cheese
The duo starts looking around the place where Shuri was attempting to extract the Mind Stone out of Vision's forehead until they see a hole in the glass where Corvus Glaive attacked the android and Cheese saw the ashes where Shuri was.
Cheese: Chao chao!
Silver: What is it, Cheese?
Blaze: I think he spotted something.
Cheese points at something.
Silver: Shuri is gone too! Plus her brother disappeared among others.
Cheese: Chao chao chao!
Blaze: Yes, Cheese! We knew what has happened to Cream.
Silver: I wonder what Knuckles and the others are doing anyway?
Meanwhile in space
Knuckles and his team are heading their way to Earth to figure out where the Avengers are since the Battle of Wakanda. Rouge looks at her computer screen, which depicts a map on Earth where the Avengers are.
Rouge: I think I've picked up something on the radar.
Shadow: What is it, Rouge?
Rouge: Come to think of it!? The Avengers are somewhere in Upstate New York.
Knuckles: It seems that they left Wakanda moments after the battle against the Black Order.
Vector: Well what are we waiting for? Let's head for Avengers HQ at full speed.
Espio & Mighty: Roger that!
As they steer the ship to its course to Upstate New York where the heroes reside.
Back to Sonic's team in Wakanda
Sonic continues to glance at his vibranium shields as Amy comes to him.
Amy: So how are you going to fight with those shields, Sonic?
Sonic: Beats me! I've never use to these things to battle Eggman with. I wish Tails would come and give them an upgrade.
Jet: Don't worry, Sonic! I'm sure we'll bring him back!
Sonic: (nods in agreement) Thanks, Jet!
Suddenly a beep is heard from their comlinks.
Knuckles: (through comlink) Hey, Sonic! Are you guys okay?
Sonic: Knuckles: I'm glad that you're alive as well!
Shadow: (through comlink) Anyway, half of our team just got snapped out of existence thanks to that Mad Titan, Thanos with his so-called Infinity Gauntlet with the stones in them.
Rouge: (through comlink) So where are you guys now?
Amy: Well we're in Wakanda investigating the events where the Avengers have left any clues.
Jet: But Sonic found one of Captain America's vibranium Shields from the battle of Wakanda.
Espio: Well good job on finding some evidence! We know where they are anyway!
Silver: Espio, where?
Espio: In Upstate New York! That's where they are!
Vector: Just meet up with us sooner or later! We'll see you there!
Sonic: All right!
With Silver, Blaze, and Cheese
Silver: Sonic, what is the information about the Avengers?
Sonic: I heard that Knuckles said that they're in Upstate New York! So we better meet up with Knuckles and the others to see them.
Silver: We're on our way!
Cheese: Chao! Chao!
With Big and Marine
Marine: This is literally technological! I wish that bloke, Tails would have liked it here before he disappeared.
Big: These buildings are somehow unfamiliar like Station Square.
Marine: Station Square?
Big: It's a lashful and peaceful city where Chaos was fought.
Marine: Who's Chaos?
Big: The water creature, who is the guardian of the Chao until the altar got attacked by some mean men led by Pachacamac.
Marine: That's so horrible! Pachacamac is a madman who ruined everything for that lass, Tikal, who's his daughter.
Big: Yup!
Suddenly a beep is heard from their comlinks.
Sonic: Yo, Big, Marine! The Avengers are in Upstate New York! We have to meet up with Knuckles and the others.
Marine: We're on our way, mate!
Big: Okey-dokey!
Soon as the gang regroup in order to meet up with Knuckles' team to see the Avengers about the Thanos situation. They boarded their ship and head over to Upstate New York.
Sonic: OK, let's go and get to Knuckles and the others!
Everyone nods in agreement.
The two ships take off. However, unknown to Sonic's team, Eggman and half of his henchmen arrive in the country to collect some vibranium to build an army.
Dr. Eggman: Hmph! Looks like Sonic and his pals are going to get the Avengers to take on the Eggman Empire and ruin all the glory they had against Thanos.
Metal Sonic: Okay, let's get to work!
Orbot: Understood! Right away!
The two bots look at the Egg Pawns working to collect some vibranium for the Eggman Empire so Eggman can conquer the world.
Avengers Compound, inside
Nick Fury's pager started beeping before shutting off while Steve Rogers, who is known as Captain America, along with him, there is Natasha Romanoff, who is known as the Black Widow, the two viewing the increasing casualties of Thanos' Decimation in the war room.
Steve: This is a nightmare.
Natasha: I've had better nightmares.
Two seconds later, a man who is a friend of Tony Stark named Colonel James Rhodes, who goes by the name War Machine enters the room.
Rhodes: Hey. So that thing just stopped doing whatever the hell it was doing.
They look at the pager.
Natasha: What do we got?
Another person in the room examining the pager goes by the name Bruce Banner, also known as the Hulk.
Bruce: Whatever signal it was sending finally crapped out.
Steve: I thought we bypassed the battery.
Rhodes: We did. It's still plugged in. It just... it just stopped.
Steve: Reboot it. Send the signal again.
Bruce: But we don't even know what this is.
Natasha: Fury did. Just do it, please. You tell me the second you get a signal. I wanna know who's on the other end of that thing.
She turns around and suddenly sees a woman with blonde hair along with a red and blue outfit with a star on it, turns out to be Carol Danvers, better known as Captain Marvel.
Carol: Where's Fury?
This takes place after the events of Avengers: Infinity War due to the fact that the Captain Marvel mid-credits scene since Thanos snapped his fingers with the Infinity Gauntlet, which contained the stones.