I couldn’t not post this, even though it’s only a teaser! However, does this mean that we can speculate on more X-Men cameos other than the likes of the already confirmed Cable? Hmmm *strokes beard*
I’ve found that this is a fan poster made by the awesome Mutant 101. Though I have to admit, they should really be hired by the movie’s marketing team to promote the sequel – it fits the first movie’s tone so well!