After taking another look at the tweeted cast photo:
I really do think this is more or less the main cast. And based on the groupings, this is my interpretation:
- The 70s folks will be Logan, Mystique, Young Xavier, Young Erik, Beast, and the villain (Dinklage). I think the mind-transfers (or whatever) will be Jackman, Stewart, and McKellan.
- The "future" players will be Logan, Xavier, Magneto, Storm, Kitty, Iceman, and Rogue. They will be accompanied by whomever Omar Sy is playing. And I'm starting to think it is Bishop.
- I think Cudmore, Booboo, and Fan Bingbing are going to be the mostly non-speaking characters like Cudmore and Kelly Hu in X2... which is why their pics are kind of drifting towards the end. They will also be mutant characters in the "future" timeline.