A theory about which characters could show up in Sonic the Hedgehog 3, sets the stage for one missing team member from the games, whose unexpected appearance could make for the perfect Sonic the Hedgehog 4. The upcoming Sonic the Hedgehog 3 will introduce Shadow to the cinematic universe, focusing on the threat he poses to Sonic and his friends. During Sonic the Hedgehog 2’s post-credits scene, it was hinted that the follow-up will be inspired by the video game Sonic Adventure 2, where the Ultimate Lifeform was first introduced. This was later confirmed by producer Toby Ascher.
However, not every character who appears in Sonic Adventure 2 has been introduced in the movie franchise yet. While Shadow is the most central newcomer because of his prominent role in the game, the characters Rouge the Bat and Amy Rose have yet to be confirmed for the film. Amy in particular is a surprise, since she is one of the earliest characters created for the video game franchise. Even though Sonic the Hedgehog 2’s ending didn’t hint at her future arrival, it would be a mistake for her to not show up in the near future.
