The trailer opens up to a sweeping shot of a mountainous region, the mountains' peaks covered in snow and ice. There is a forest down below their range.
King Fergus (background): "Long ago, when I was just becoming a king, I had an encounter with a ferocious beast..."
The scene changes, showing Merida walking through a somewhat dark forest, her bow in hand and her arrow holder strapped to her back. She hears the sound of something running to her, so she pulls out an arrow and puts it in her bow, pointing the tip of the arrow around to where the source of the sound is coming from.
King Fergus (background): "It was an enormous beast, and it was coming straight for me."
Merida hears the sound of the footsteps getting closer and closer, so she pulls the arrow back and aims it at the clearing where the footsteps are the loudest.
King Fergus (background): "Then it—"
The scene quickly changes to a 10th century castle dining room, where Merida and her family (King Fergus, Queen Elinor, and Merida's three triplet brothers, Harris, Hubert, and Hamish) are eating dinner. Merida looks at her brothers.
Merida: "Attacked dad! Biting off his leg!" *says with enthusiasm*
King Fergus: "Aw, I liked telling that part."
The scene quickly changes back to the forest. Sonic the Hedgehog runs into the clearing and narrowly dodges an arrow, ducking so that it flies over his head.
Sonic: "Woah!"
Merida quickly puts in arrows, one after the other, in her bow and fires them at Sonic, who dodges them by ducking, moving to the side quickly, and other fast movements.
Merida: "Stay away from me, you strange creature!"
She keeps firing arrows, and Sonic keeps on dodging them before looking at her.
Sonic: "I'm not gonna hurt you!"
One arrow comes straight at Sonic's head, which he narrowly dodges. The arrow hits the tree Sonic was standing in front of, right where his head would have been.
Sonic: "Holy!"
The scene changes to a fly-over shot of DunBroch, a 10th century Scottish kingdom before zooming down to a big gathering behind the castle. Various people are doing many talents. One person is juggling swords and there are javelin throwers.
The scene cuts to Merida, who is at the gathering, getting ready to fire an arrow.
Merida (background): "I'm Merida. Most people call me Princess Merida, but I prefer just Merida."
Merida fires the arrow, which hits the target in front of her dead-center on the bulls-eye mark before the scene changes to Sonic and Merida walking side-by-side in the forest of Green Hill.
Sonic: "I'm Sonic. Sonic the Hedgehog."
The screen turns black and the words 'In a world of tradition...' appear on the screen.
Scene change to Merida's bedroom where she and Elinor are.
Merida: "I don't want to act like a princess. I want to act like how I want to act. This is my life and I think I should act how I want to. Not how you want me to act. I want to have freedom!"
The scene changes to a jungle area with Merida, Sonic, and Tails coming out of the jungle and into a clearing covered with ancient ruins and a small shrine in the center of the ruins.
Merida: "Woah."
The scene changes to an open ocean where Merida is standing ontop of the top wing of Tails' bi-plane The Tornado, holding onto the top while Sonic holds onto a stand that's in the back area of the plane and Tails is in the cockpit.
Merida (background): "I also want to experience new things."
Merida is smiling happily as she looks out at the water, the wind whipping through her red hair.
Merida: "This is so amazing! I wish this would never stop!"
The scene changes back to Merida's room with Queen Elinor looking at her.
Elinor: *sighs* "Merida, you're a princess, you should act like one. I know you don't like to, but it's for the best interest of your people, and for me. Now, start acting like one."
Elinor walks out of the room as Merida groans in annoyance and lays on her bed.
The screen turns black and the words 'One girl would turn it all...'
The screen changes to Merida standing in Mercilla the Wise Woman's hut, facing her.
Merida: "I just want to get away from it all."
Mercilla: "Then maybe you need to go somewhere else for a little bit."
Mercilla opens the palm of her hand, creating a large portal with the image of a green hillside with a large ocean in the background appear above the palm.
The scene changes to Merida, who is looking at all of her surroundings in Green Hill with amazement.
Merida: "This place is so cool looking."
The screen turns black again and the words 'Upside down' appear on the screen.
The screen then shows the ground of Dr. Eggman's fortress where tons of robots are. Merida is shooting at them with her bow and arrows while Sonic is doing multiple Homing Attacks on a group of Egg Pawns. Tails is flying overhead in The Tornado, transforming it into its battle mode before he starts strafing the robots on the ground.
Lord Dingwall (background): "This is war my fellow people. And I don't intend to lose it!"
The scene quickly changes to villagers battling one another in DunBroch, alongside the three lords (MacGuffin, Macintosh, and Dingwall) as they all try to get into the castle.
The scene changes to King Fergus, Queen Elinor and the triplets, who are hiding in the King and Queen's room.
King Fergus: "How did this happen?" *in a sad voice*
The scene changes to DunBroch being attacked by tons of Dr. Eggman's robots, before changing to Sonic and Merida as they battle some of the robots side-by-side. It changes to a scene of E-123 Omega pulling his hands into his arms and replacing them with turret barrels before unloading multiple bullets onto a large group of Eggman's robots while Shadow unleashes a Chaos Spear attack from his palm on a group of Rhino-Tanks as Knuckles rips two Egg Pawns apart.
The screen turns black.
Merida (background): "If you could change your fate... would you?"
The scene changes to Sonic and Merida walking through the Green Hill forest.
Sonic: "Well... not really. I like running and being free all the time."
The scene quickly changes to Sonic and Merida looking up at the form of the Eggasaurus Rex, a robot theropod dinosaur, with Dr. Eggman sitting in the cockpit that is above the machine's eyes. The Eggasaurus Rex snarls at both of them and lunges its mouth at them, but the scene quickly changes back to Sonic and Merida walking through the forest.
Sonic: "Well, I would change the part about me having to fight robots all of the time."
The screen turns black and the words 'The Hedgehog and the Bow' appear on the screen. Sonic appears ontop of the words, tapping his right foot impatiently before looking at his 'invisible watch' on his wrist.
The screen goes black again, but changes to Merida shooting an arrow at a large boulder in the ancient ruin near the Master Emerald shrine. The arrow hits the center of the rock.
Knuckles: *laughs* "You didn't even break it."
The scene quickly changes to the rock breaking apart, crumbling into little pieces. Merida looks at Knuckles, who has a shocked look on his face, and smirks proudly before the screen turns black.
