From Latino Review:
LR: Your group of X-Men is growing. Each film adds new Mutants and now with Days of Future Past doing what it did, some of the old favorites can come back. AND you have Channing Tatum waiting in the wings to bring a new version of Gambit to the screen. Will he be introduced in a team movie or get a solo outing or is a solo movie a better way to focus on a characters origins?
Simon Kinberg: I genuinely don’t know the answer to that question. It’s something we are all talking about whether it would be good for Gambit to be in a mainline X-MEN movie or he would be in his own stand-alone movie potentially one day to be able to be in another X-MEN movie after his Gambit movie introduces him. I really don’t know the answer. I don’t think there is a hard and fast rule which way is better. I think both ways have worked and I think actually the real question will be is there a role that is strong and specific enough for Gambit in a mainline X-MEN movie whether it be APOCALYPSE or future X-MEN movie that would be the right way to introduce the character. You don’t want to stick characters in these movies and manufacture something for them to do. You want the movie to tell you that it needs another character or ideally it needs this specific character.