Kyle Gibney - Tumblr Posts
I was thinking more about this a bit more. Some of it about what kind of story it could tell, some of it about who the villain/antagonist could be.
I think a coming-of-age story makes sense for these characters, them figuring out who they are.
For the villain, I was chatting with a friend, and they were a bit on board with the idea of Mister Sinister. I don't want Magneto as the villain, I think he’s better as the villain to Professor X and his team of X-Men. For this hypothetical New X-Men movie, just like in the original comics run, I say make Cyclops a mentor. He’s been an X-Man long enough he’s got knowledge he can pass on.
Mister Sinister could also have a group of followers or henchman, like say the Marauders. From what I can tell, been a while since I've read an issue or arc with the group in it, the Marauders have an almost rotating number of members. There is only one character I am quite sure would fit really well, Kyle Gibney/Wild Child. Maybe Sinister specifically chose Wild Child as a way to try recreating the conflict of Wolverine and Sabretooth, using him as the Sabretooth to X-23/Laura Kinney's Wolverine.
Seriously, if you got ideas you want to add on, add them if you feel like.
You know what would be pretty cool? An X-Men animated movie in a style similar to the Spider-Verse movies. Just instead of the usual X-Men characters, make it about the younger mutants Like say this group:

They all got varying powers and abilities, and you kinda gotta admit, the visuals some people could do with these could be awesome.
While X-23 is a top contender for lead, I say make the lead of this theoretical movie Prodigy. That's the guy with the bug-eye looking goggles for those that don't know. He can telepathically copy any skill from anyone. As an example, say he's playing basketball, he can copy the basketball skills of the person he's playing against.
Mostly anybody of this group could be the main character. I only say mostly anybody, because while I love Rockslide, I think he works best as a secondary or supporting character.
We don't need more multiverse movies, so it being set in a singular universe works. Have the usual X-Men characters act as mentors, they've seen enough that they could pass down that knowledge to students and help them.
If anybody wants to add some ideas, that's cool.