Xabi Alonso has a clause in his Bayer Leverkusen contract which would allow him to become manager of any of his former clubs - Liverpool, Real Madrid or Bayern Munich - as early as next summer.
Pep doesn't rly have a reason to leave City. Only other team where he'd get the same resources is PSG and it's a shitshow of a club in a much weaker league. Unless he gets bored and goes back to Barca I don't rly see him leaving. Maybe to Italy if Klopp somehow ends up there or an NT.