My bet is the guy in the black cloak is Glenn. Saw it on Reddit I think, likes up with the mobile game (at least for as far as I am) and the weapon is a match.Okay my theories on rebirth after watching the trailer:
The guy in black cloak in Junon is Revees.
End scenario 1: City of the Ancients plays out the same as in og (and they should then have the rest of the northern continent as post-credit solemnness.
Scenario 2: Cloud dies.