Many fans think that the new Sonic the Hedgehog 3 poster hints at Amy Rose's appearance in the movie. The poster for Tika Sumpter's Maddie shows her in a pink sweater with a pink background. The fan favorite Sonic character, Amy Rose, is pink. In the first Sonic movie, Sumpter often wore yellow, which is color of Tails, who appears during the end credits scene in that film. Then, in Sonic 2, Maddie wears a lot of red and black, which hinted at Shadow, who appears in the end credits scene once again. So now, with Sumpter being featured in pink, I think the odds are really good that Amy Rose will be showcased in the end credit sequence and become a main character in Sonic 4. She is well loved by fans of the franchise, myself included, so fingers crossed this is an accurate theory.
