Honestly, I think only Scott and Rachel are going to be regulars on X-Men and everyone else is on rotation. Jean and Logan will be semi-regular but they technically have their own book that will take up most of their time. Rachel is probably going to be Scott's regular telepath, plus if they stick with some of the things that have happened, Scott may just want to keep his daughter close all the time.
But I imagine the Marauders team will pop-up in X-Men occasionally. But because their team may not be at base very often, I think Kitty, Storm, Emma, Iceman, Bishop, and Pyro may be away from base a lot and may not appear in X-Men very often.