This will be an interesting change. But IMO it CANNOT be a hard reset to the mansion.
It would be cool to keep all these locations open and in the sand box.
They can have a the X-Mansion back but id still want Arrako and Krakoa to be in play. Or if they end up losing Mars. Move Arrako to Genosha.
I think Duggan mentioned on Xwitter that he has outlines in place till 2027.
2019-2027 is a good chunk of time and good era.