joefavs said:
I’m betting he’ll have a distinctly different mask (if he has one at all)

The mask is already iconic (even though the character isn’t at this juncture) and there’s no reason why they should leave out such a terrifying mask. Plus don’t you think he should have spares lying around?

and a more traditional saber the next time we see him.

Perhaps. Maybe he’ll get Vader’s once he completes his training.

ZkinandBonez said:
Maybe KoR originates from the Church of the Force? For all we know there could have been a religious war going on in the thirty years between ROTJ and TFA.

The KoR were originally called “The Seven Light” in the visual dictionary so that’s entirely possible.