Id be more than happy with just two more team movies, one set in the past and another set in present.
But if Fox goes beyond that, Id be super happy, of course
DOFP will mark four movies with original cast actors and if they do a FC sequel set in the 80's, that would mean three movies set in the past, so seems like a pretty decent arc. Of course they could do more, but its up to then.
Lets see what happens