Space, 2014
On board the Sanctuary II, 2014 Nebula has captured present day Nebula and she starts fighting her future self.
2014 Nebula: You're weak.
Nebula: I'm you.
2014 Nebula throws a punch straight at Present Nebula. 2014 Gamora walks into the room.
Nebula: You can stop this. You know you want to. Did you see what happens in the future? Thanos finds the Soul Stone. You wanna know how he does that? You wanna know what he does to you?
2014 Nebula: That's enough. [kicks Present Nebula to the wall and pulls out her Electric Knife.] You disgust me. But that doesn't mean you're useless.
2014 Nebula steals the golden plate on the side of Present Nebula's face and wears it on herself. Then she walks up to 2014 Thanos, gives him a Pym Particle and shows him her new look.
2014 Nebula: How do I look?
Vormir, 2014
On the Benatar, Shadow, Rouge, Natasha and Clint arrive towards the planet.
Clint: Wow. Under different circumstances, this would be totally awesome.
Rouge: Tell me about it!
Shadow's time GPS goes off.
Natasha: What's going on?
Shadow: (check his device) It's from Sonic! And said that he, Knuckles and Kirby are on Space Colony ARK in the 1950s while searching for Lincoln.
Clint: What's he doing anyway?
Shadow: Lincoln said something happened to his sisters a few years ago due to a big fight over a dress.
Rouge: (shocked) That poor guy just got girl problems in his life.
Natasha: It's definitely a 10 on 1 situation for him anyway.
Shadow: However, Rouge and I going to Space Colony ARK to find them before we return to the present day.
Clint & Natasha: Good luck!
Both the hedgehog and the bat activate their Advance Tech Suits to shrink through time via Quantum Realm to their destination.
ARK, 1950s
In the corridors of the ARK, Sonic, Knuckles, and Kirby are looking through the area where the military guards arrived on the colony to shut down the research project that Professor Gerald Robotnik was working on.
Kirby: So this is where they arrived in the first place to destroy the project for Maria's disease!?
Sonic: Indeed! The government wanted to use it as a weapon to keep the peace from enemies for example.
Moments later, Shadow and Rouge appear behind them.
Knuckles: What's up, you guys?
Rouge: We just arrived to see how you guys are doing?!
Shadow: I just remembered the day I moved on from my past to help move forward to reality.
Kirby: Well that's a way to stop thinking about the past.
Shadow: It's true! I never figured out Black Doom and Thanos had a little history together about ruling worlds and massive genocide.
Sonic: Not to mention their bases like the Black Comet and the Sanctuary II.
Knuckles: Hmm... For some reason they can be at hard times around each other from the looks of that.
Shadow: Well good riddance to bad rubbish.
Kirby: You said it, Shadow!
Rouge: Now we still got to get to the doctor's grandfather's lab. We need some Chaos Drives.
Shadow: I'll lead you to it.
Knuckles: We'll be heading back to the present. So be careful, you guys!
The two nodded before leaving to find Gerald's lab.
Sonic: I've got somewhere to go!
Knuckles & Kirby: What!?
Sonic: I have an important stop I need to go.
Knuckles: Where's that at?
Sonic: The World of Camelot!
Kirby: (in awe) That's where King Arthur once settled.
Sonic: Definitely. Well that settles it. I'm going to Camelot to see an old friend.
Knuckles: Who is that friend of yours anyway?
Kirby: (confused) This is awkward.
Sonic: You'll see!
He activates his Advance Tech Suit to shrink to the Quantum Realm before the two. However, moments later, Knuckles thinks of telling Kirby about the Echidna Clan from Mystic Ruins in the past.
Knuckles: We'll meet up with him later! Now let's go to Mystic Ruins from the distant past about the Echidna Clan.
Kirby: You mean that Valkyrie told you about Pachacamac?
He nods before looking at his time-space GPS and Kirby did the same.
Knuckles: Yeah! But let me tell you about what happened eons ago!
As the duo activate their suits before disappearing through time.
Grand Kingdom, 12th Century
Somewhere near the ruins of Camelot Castle, Sonic was seen running through the village of Camelot to search for Caliburn, who has fought along side him since the beginning.
Sonic: So this is how I remembered. I wonder Caliburn is up to anyway?
He runs towards the collapsed castle only to find out where the Sacred Sword is somewhere in the center of the garden of the castle.
Caliburn: Ah, Sir Sonic! Good to see you!
Sonic: Good to see you too, pal! You ready to see my friends in the future?
Caliburn: You bet!
The Blue Blur grabs Caliburn's handle before activating his Quantum Realm Suit and disappear through time.
Mystic Ruins, 4000 Years Ago
Around nighttime, Kirby and Knuckles look at the Mystic Temple before being remodeled eons later.
Knuckles: Needless to say! It's been very difficult about Chaos going into rage when the altar was attacked in the process.
Kirby: Come to think of a certain reason! They all seem brand new before it got destroyed.
Knuckles: No time for moping around, let's find out the real truth.
Kirby: All right!
They head toward the doorway to the Altar of the Emeralds only to find the altar being set on fire.
Knuckles: Now let's stay quiet! They're about to attack the altar.
Kirby: Now let's just wait and see.
Knuckles suddenly nods.
In the distance, Tikal and the Chao are blocking the path of the Knuckles Clan led by her father, Pachacamac, who is arguing with his daughter about needing the emeralds for their people.
Tikal: No, I won't let you do this, father!
Pachacamac: Move aside, Tikal! Get out of my way!
Tikal: No way!
Pachacamac: Did you hear what I said?
Tikal: I refuse to obey!
Pachacamac: The Clan needs those 7 Emeralds to give us total power! It is power for our people. And they are your people as well, you know! Now we need the Emeralds!
Tikal: But this plan of yours is such a catastrophe. Attacking innocent people and killing numerous others as well. Anyway I am not letting you pass.
Pachacamac: All right, that's it! Ready, men! ATTACK!
Tikal: FATHER, NO!
The Knuckles Clan started charging towards Tikal and many Chao. Sensing what happened, Chaos becomes infuriated.
Unbeknownst to the Knuckles Clan, Knuckles and Kirby witness the mayhem while watching the Altar get invaded.
Kirby: What a terrible father he really is.
Knuckles: (punches a rock in frustration) I couldn't believe he attacked his own daughter. Pachacamac has led his Clan for major conflict with the Nocturnus Clan.
Kirby: What makes you so sure about it?
Knuckles: I think we're about to find out!
Upon sensing what happened, Chaos becomes infuriated by the mayhem. The Chaos Emeralds circle the Master Emerald, then Chaos rises to confront Pachacamac and his soldiers as they reach the Master Emerald, causing them to recoil in fear.
Pachacamac: (surprised) What is that thing anyway? (Chaos unleashes its wrath on the Knuckles Clan and everything whites out) Noooooooo!
Knuckles: So that's the reason why Chaos went crazy and gone on a rampage.
Kirby: (points to something) Knuckles, look! Over there!
Knuckles: (sees Tikal) That must be Tikal! She must be in really bad shape after the attack.
They walk up to her to make sure she is all right.
Knuckles: Tikal, are you all right?
Tikal: I think so! But I couldn't stop them from taking the Emeralds.
Kirby: And that liquid creature took care of them from the look of it.
Tikal: (she gets up) Now I know I have to do something that needs to be done.
The three walk up to the Altar where the Master Emerald is before Tikal could perform her prayer.
Tikal: The 7 Emeralds are the servers. Chaos is power, enriched by the heart. The controller serves to unify the chaos. Uh... The 7 Emeralds can change our thoughts into power. If this Emerald controls that power... Please, you must stop him!
As the Master Emerald glows brighter before it could spread Chaos Energy across the island which would become Angel Island. However, Knuckles and Kirby run down the steps before the ground starts to shake until it could be lifted up to the skies.
Kirby: Come to think of it, the Emerald's power could keep the island afloat just to prevent another major incident from occurring. Right?
Knuckles: Yes! I always knew that Pachacamac could actually steal the Emeralds to give the people power in order to drive of enemies.
Kirby: Well anyway. Let's get back to the present and rejoin the others!
Knuckles: Okay, let's get to it!
They activate their Quantum Realm suits before disappearing to the present day.
The Avengers except Nebula, who was replaced by a 2014 version of herself, traverse through the Quantum Realm before returning back to the present safely.
SpongeBob: (has the Magic Book in hand) Whew! Mission accomplished!
Sonic: All right, we actually made it back just in time.
Bruce: Did we get 'em all?
Rhodey: (holds the Orb) Are you telling me this actually work?
Silver: Indeed it does.
Leonardo: Well we got the parts for the gauntlet.
Donatello: To put to work on momentarily.
Plankton: Hold on! I think we're missing someone.
Lincoln: (looks at Clint about Natasha) Uh, Hawkeye!
The white haired boy looks concerned for him. However, there's a pause as everyone notices someone is missing from the group.
Bruce: Clint, where's Nat?
As the archer silently tells them all they need to know. The mission was completed but at a dire cost. Sadness overtakes everyone.
Shadow: I can't believe she didn't make it.
Rouge: At least you got the Soul Stone. Right?
Clint nods with sadness.
Bruce falls to his knees and pounds the floor in grief.
Come to think of I didn't add the Red Skull and the death of Black Widow scenes in it. But momentarily, Sonic regains his old friend, the Sacred Sword, Caliburn. And it was revealed about the history of Angel Island when the Altar of the Emeralds were attacked by the Knuckles Clan led by Pachacamac which made Chaos go berserk after witnessing Tikal and the Chao got wounded from the attack before wiping out the Clan as a result.