According to Variety, X-Men: Days of Future Past producer Lauren Shuler Donner said that Tatum will take on the role of Gambit at the premiere of that film. Donner said that she believes that Tatum will be a great Gambit and that she knows he can handle the action. According to the Variety post, Tatum will star as Gambit in a spin-off movie. It's unclear as to whether he will appear in the upcoming X-Men: Apocalypse.
After the critical disaster that was X-Men: Origins- Wolverine, it's clear that Fox is really trying to rejuvenate their X-Men franchise. And by recasting a major character, who was only previously used in an despised film (Taylor Kitsch played Gambit in Origins-Wolverine), with a big name star, it's clear that Fox wants to bring some more star power to this franchise. At this point, I'm pretty much done with the character of Wolverine on his own (I still enjoy Hugh Jackman's portrayal in ensemble pieces), but I'm intrigued to see where Fox goes with spin-offs of other characters. It's a promising idea.