Cuāuhtemōc
Banned
Would we see an Arab Constantinople (and the Ionian Coast, Greece and the lower Balkans) hold out as a bastion of Arab Islam against the Mongol hordes?
Odds are that we won't see the Mongols with a POD in the early 600s. I can see the Turkic tribes if they are united under the Tengrist or maybe the Nestorian banner cause trouble.