Not so sure about that....as FOX wants to 'appear' more mainstream. They make that harder when Hannity...a very public cheerleader for Conservativism...holds the 10-11 slot.
OTOH...can't 'see' Kelly moving anywhere unless it's for the anchor on one of the big 3 news slots.
Fox wants to appear more mainstream while holding on to its core audience.
Hannity has the core audience ratings, so I doubt he's leaving.
OTOH Fox can hire almost anyone to give them a mainstream appearance.
Kelly is replaceable, more-so if her ratings continue to slip.
I see her on MSNBC in a year but agree with
@sinkspur ...the election result may be the determining factor.