I kind of hope they do the first movie (provided it becomes a franchise), like Deadpool, in the sense that it's not a straight up chronological origin story. I hope they bounce around a little bit. Like maybe show Remy's involvement with the TG and then flash back to when he was a baby for a minute or flash back to when he was younger and the reason behind why he throws cards (I love that).
Introduce Sabretooth as the main villain, again hoping it'll be Schreiber because he would definitely bring some more star power to the film, which can't hurt. Then as the films transition from one to the other, we get reintroduced to Sinister and learn how fascinated he is with Remy's DNA. I doubt we'll ever get any of the New Son stuff, just like I doubt we'll ever see Deadpool and the Mithras story adapted. But there's more than enough story to make it a trilogy. And even if they decide not to go that way, I wouldn't be upset with getting a solo film and then have him added to the cast of the main x-films or the x-force films.
Who am I kidding? I'm ready for anything at this point.