#2 Blackout
While NXT doesn't usually do rematches anymore, the way he was written out of Brooklyn begs for some kind of return. It would be the obvious way to go, but that isn't necessarily bad. Ciampa will be revealed as Aleister Black's attacker, or at least the mastermind behind the attack.
Already owed a rematch after the dubious loss of his championship, this will only make things more personal. Aleister Black will return to battle the usurper of his throne at NXT TakeOver: War Games II.
It will certainly be the biggest threat to Ciampa's reign so far. Aleister Black had him dead to rights in their first match, and will scare the pants off of Ciampa at War Games.
But somehow, someway, Ciampa will find a way to slither by, as he always does. The Blackheart will make Black fade to black in his NXT swan song. The former king will be exiled to Raw or SmackDown, trapped in a foreign country, no longer a threat to Ciampa's throne.