Hickman explicitly stated that the needs of the franchise come before his possible fan inclinations. I'd think the most important thing for him with this assignment is "winning", i.e. making the X-Men Marvel's premiere comic again. Maybe even beating Batman as a moon-shot. So whatever the means for that is then...
I could see the triangle being explored --- would be a bit of a missed opportunity otherwise, but I would not totally count on it --- but the chances of Scemma returning are virtually nil.