Channing Tatum is in talks with producer Lauren Shuler Donner to play Gambit in an upcoming X-Men film. That's not just another Internet rumor. This info is coming straight from Tatum himself, who made the following remarks in a post-show interview after the MTV Movie Awards:
I met with Lauren Shuler Donner. And I would love it. Gambit is really the only X-Man I’ve ever loved. I mean I’ve loved them all, they’re all great, but I guess from being down south – my dad’s from Louisiana, I’m from Mississippi, Alabama, Florida – I don’t know. I just related to him. He’s just kind of suave… He’s the most un X-Men X-Man that’s ever been in X-Men. Other than maybe Wolverine, who’s like the anti-hero. He’s a thief. He’s not even a hero. He’s kind of walking the line of grey…He loves women and drinking and smoking and stuff so he’s just a cool guy who happens to have a moral center….I hope it [comes together]. You never know it’s a weird industry. If the stars align, I would die to play it. I’m already working on the accent. It’s crappy at the moment.
As ComingSoon.net points out, director Bryan Singer has hinted at an appearance by Gambit in 2016's X-Men: Apocalypse. So assuming Tatum is not a compulsive liar, the odds that we'll see him in that film seem to be increasing. (Source: Nerd Bastards).