Also, I think Hickman wants to give characters a home. I don't think he would have put Rachel with Scott if he didn't intend to use her ongoing. There is a reason that X-Men #1 is showing the Summers/Grey family united. As Cable goes to Fallen Angels, and Jean goes to X-Force, Corsair is going with the New Mutants, I think Rachel is going to stay with Scott on X-Men. There are four books that are going to have someone from the Summers/Grey family represented on them.
1. X-Men - Scott and Rachel
2. X-Force - Jean
3. New Mutants - Corsair and the Starjammers are joining them
4. Fallen Angels - Cable is joining up with Kwannon and X-23
I think it's intentional that the Summers/Grey family is represented on the majority of the books.