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By far the film’s biggest Easter egg comes in the mid-credits scene when we hear talk about Project Shadow, before Shadow the Hedgehog is revealed in a secret laboratory. Project Shadow was first mentioned in Sonic Adventure 2 and expanded upon in the Shadow the Hedgehog video game. This is possibly the biggest revelation coming out of the film’s sequel, as it potentially sets up the next villain Sonic and friends will likely face in Sonic 3. With the introduction of the Master Emerald, the chaos emeralds and the Shadow reveal, it seems we’ll be seeing more Sonic Adventure characters show up in the next outing (we’re looking at you, Chaos). Only time will tell, but seeing the rivalry between Sonic and Shadow play out on the big screen is sure to be epic.