Sonic the Hedgehog 3's new trailer showcases Shadow the Hedgehog's live-action debut, played by Keanu Reeves, and reveals a plot involving a team-up between Sonic's friends and Dr. Robotnik to stop Shadow's quest for revenge. The film draws heavily from Shadow's video game origins, including key characters like Maria and Gerald Robotnik, and iconic moments like the Space Colony ARK and the Eclipse Cannon. Director Jeff Fowler aimed to balance fan service with a broader appeal, incorporating action, humor, and emotional depth. The movie promises to be the most game-accurate and potentially darkest installment yet, with a post-credits scene hinting at future films.