I think that Tatum was excited at first but after delays he lost his interest and started to look his other projects.
Well, Gambit WAS the best thing in that movie. Problem is, it was an awful movie from start to finish so it's not a very high bar to clear I think Kitsch had the right look for Gambit and honestly I think as an actor he had the ability to pull it off. But the problem was that he really didn't know Gambit, he said in interviews he'd never heard of the character before the audition. Now fair play to him he went out and tried to do his research but maybe he just didn't read enough issues (he only ever mentioned the issue where he talks to Storm on the roof then beats up Sabertooth), because his Gambit could've been any cocky teenager in a casino if you took away the cards and the staff. But I think it's unfair to lay it all on Kitsch since that script and direction was pretty bad for the character. He won the plane in a game? Why not have him steal it? Anyway, I would've been curious to see Kitsch try again with a much better script and a better director. Maybe a director who loves the character. Everybody rips on John Carter but I liked it and thought Kitsch didn't do too badly. Everything that came after that...pretty bad, yeah I can see what he's not in a lot of stuff these days. But as it is, Tatum love Gambit and seems to know Gambit pretty well so I'm happy for him to have a go. If only we can get to it happening!!
This guy wants the Gambit role.http://m.tmz.com/#article/2017/07/09/nick-bateman-gambit-bo-staff/
It is funny that in comments on youtube people are excited to see Bateman as Gambit and don't like idea of Tatum as Gambit. I don't think that Bateman has more Gambit look then Tatum but he is cool with Bo.