Cuāuhtemōc
Banned
What would also be interesting is if the new caliphate is centered on Constantinople, what will happen to the Arabian/Egyptian lands? Will they become more schismatic going along Roman tradition? Will they occasionally break away? Especially if Persia has the time to patch itself back together a more widespread but fractious Islam might be a result.
I would think the Ummayads would consider moving to Constantinople especially if they plan on expanding north and west from the Balkans. Or some breakaway Islamic Caliphate. And yes, I would tend to think so.