It all depends on who plays Gambit. It they get some pouty-faced male model who think he's got charisma (but of course, can't act his way out of a paper bag), it'll put even George Clooney's Batman to shame. And I'm 90% sure that's what they'll end up doing too.
The casting priorities should go something like; Good actor first, then fairly unknown, fits the mental image of Gambit. Not the other way around.