Best thing that could happen right now, guys? Marvel and Disney reboot X-men with the same love and care they treated The Avengers with. Best thing on top of that? Gambit gets a prominent role in said reboot. Sad thing is though, there are so many X-men to choose from, the chances of Gambit being a core member are slim. Other sad thing is that this would be YEARS away.
Anyway, if it were to happen I hope they'd take a grittier, darker tone for the X-Men. Avengers already has light-hearted covered.