The full rundown is on Cinescape. I’ll summarize it below, since it’s spoilery.
A small scene was filmed with Gambit, but it’s been left on the cutting room floor. James Bamford does have the right look judging from his pic on Cinescape, martial experience (with a staff), and he knows the character well enough to make a joke about playing the part not being “in the cards,” so I hope he at least gets a reading for the role in any sequel that uses him. (I don’t know if he can act, but the reading will show that.) Also, look for Steve Bacic to play a hairless Hank McCoy in a small role.