I think Marvel Studios could do a strong GS X-men #1 as the first movie. Flashbacks to original team to respect the history but start the new films with a true representation of the beginning of the modern age of X-men. That could segue well into hellfire club and magneto. That said, I’ve really become a fan of HoX so I think using Krakoan nation as a baseline for a new film series would be neat too. They could say that they’ve been in hiding all this time in the MCU. Marvel Studios has done right by Marvel characters in the MCU so as long as they hit the most well known X-men out of the gate I think they’ve got a winner.