Some of the Morlocks decide to stay at Xavier's school and some decide to return to their tunnels.
Agent May takes a distress call. She ends up having to kill a small child with powers who poised a clear and active threat. At the end of it, after a psychological evaluation, she is pulled off the team.
A young woman displays superpowers and is recruited to join SHIELD.
This is the 1,000,000 BC Avengers, only more realistically timed?
The Morrigan is with the Jason and the Argonauts (and bones down on Hercules... bone... down...)
The Avengers are shocked when rockstar Golden Beetle has information on how to save the day. His tech helps them build a time / dimension jump.
In the wake of Thanos' snap, Osborne (or someone similar... Mayor Fisk?) forms a sort of dark reflection of the Avengers, etc