User blog comment:Blazing Flare/Several Sonic Boom Posters found?? With a Marine Look a like???/@comment-1392727-20140515140044

It's just a poster of the characters, whether it's an official one or not we already know there is a female character who looks like Marine the Raccoon.

I doubt she is actually Marine but the design does seem to be inspired. I think taking inspiration from Yuji Uekawa's designs would create a more legitimate-looking Sonic character that fits the trademark of the series, so that is what they went for.
 * On another note, I have noticed that a lot of fans speculate Blaze the Cat to appear because we have "Marine". I don't even know how they made that connection in the first place considering that this branch of the franchise is unrelated to the central one.