Fox has already had two stabs at bringing Sabretooth to the screen with two distinctly different outcomes. The first time was utilising pro-wrestler Tyler Mane as a savage, muscular, and utterly forgettable henchman for Magneto in the original X-Men film, whist the second saw Liev Schreiber play the more straight up role of Wolverine's nemesis in X-Men Origins. Neither were particularly failures, but Schreiber in particular deserves a second crack at the role. Not only would an appearance by Sabretooth help tie the film to its parent franchise, but if played right it could also provide Gambit with a moment of peril. It wouldn't make sense as a large role, but an extended cameo would certainly be a fan pleaser, especially if it hints at Gambit's dark past with the Marauders.