Sonic the Hedgehog 3 film concept art reveals cut content and secret characters
Concept art from Sonic the Hedgehog 3 reveals cut scenes and secret characters.

Sonic the Hedgehog 3's concept art, released by Tian He Yan Studio on Weibo, unveils cut content and secret characters planned for a post-credits scene. The timing of the release coincides with the digital availability of the film, a month after its cinema premiere.
The images depict significant events, such as Shadow and Maria's meeting and an epic space battle involving Super Sonic and Super Shadow. An action sequence introduced Knuckles and Tails in a motorbike chase across London, hinting at scenes that did not make the final cut.
Most intriguingly, characters Amy Rose and Metal Sonic appear, suggesting they were part of the original storyline. The setting with Eggman in an emperor-like attire hints at a potential bad future theme aligning with Sonic CD, possibly explored in Sonic 4.