Let's say Marvel decides to explore the lives of the children of Magneto and how being the children of one of the deadliest mutants on the planet has shaped them.
Make it into a 6 issue limited series. With them dealing with "Daddy Issues" and how other perceive them. Maybe throw in a villain to give them something to fight against.
Cast:
Magneto
Polaris
Scarlet Witch - back as his child
Quicksilver - back as his child
Grandkids - Luna, Speed and Wicca
Zaladane and maybe Joseph (maybe a younger version)