The movie has two big names attached to it...Tatum and Gore Verbinski, who did the first three Pirates of the Caribbean movies (downside, he also did The Lone Ranger). I'd be shocked if Disney scrapped it, considering it is slated to start filming in early 2018 (I think pushed to March now, but did they really want to be in New Orleans in February around Mardi Gras anyway? Just getting rooms for everyone would have been a nightmare).
On the plus side, this should free up the 'freeze" on Gambit merchandise. Funko, for example, could not do certain X-characters, as Disney put a freeze on them. I remember reading Gambit and Nightcrawler were two of them