Do you know who I am??? I am a very important person across all the world. I assassinated Osama Bin Laden, I protected the presidents of many countries several times over the years from terrorists and I protect the internet that you're using and this is how you speak me?? This is fucking RIDICULOUS!!!! I DIDN'T TRAVEL TO SPACE FOR THIS SHIT.
I think this is just a fan representation. To the best of my knowledge, there has been no news of Shadow being in it. Since Sonic Boom is basically America's take on the Sonic franchise, he may not be in it at all.