I'm certain that the acting is still going to be carried by Fassbender and McAvoy. And Lawrence too (I think she's in this one?). Munn is probably going to have the DoFP beginning / end treatment, where she might have a few lines and its mostly showcasing Psylocke's powers.
I disagree, if it was another movie featuring Magneto as the main villain. Nothing against Fassbender, but I'm tired of Magneto being the big bad all the time. Apocalypse + 4 Horsemen should be a great villain(s) though.
Ziggy, I'm no expert like some of y'all, but I've never heard of an X-person who takes the form of a potted plant, like in that photo.