Hey...I believe Shadow has finally awakened Black Doom's DNA he has inside him, maybe that's why he got those wings that are similar to Black Doom's! (If you don't know what I'm talking about, go and see the last cutscene before the final boss of Shadow the Hedgehog)
a fair info of the trailer game. however... [music]: Smash Your Enemies [Synth Metal Remix] | InGodWeRock | Sonic X Shadow Generations [u have to give this music a listen. its very interesting & awesome BANGER song]