not providing any constructive criticism for this new character
I actually like the artwork. I think the workout gear looks great!
But do I have a crazy suggestion:
Instead of being a character that now shows up in the game, perhaps Mystique could be more of a test-bed for future character additions. In other words, if you (the modders) have unfinished artwork or dialog for a character that you
might like to introduce in some future update -- instead, use Mystique to allow us a sneak preview of that character in game.
So, you have unfinished Jean Grey artwork?
Psylocke?
Storm?
Instead of showing us still images of the character, allow the players to interact with her (Mystique trying out a new disguise) in a single scene. That way, we can provide some feedback about the art/dialog before you've gone to all the work of making a "finished" character.
Later, once that character is introduced in the game, Mystique will explain that its "too dangerous" to try out that look now that the real Jean Grey (or whomever) is around. But, would you like me to try on another disguise for you?