I’m also convinced the Master of Masters is someone we know. Of course, probably the actual reason why Nomura used the hooded designs was that he himself didn’t know who it was at that point and/or he didn’t want to spoil the new design. But with all that buildup I sincerely doubt it’s going to turn out to be some rando because Nomura loves his connections.

I honestly think it might be Sora. Not much there to support it other than that he seems to be a cheerful guy and the Gazing Eye is blue. It’s even weirder to consider when it’s really vague whether he’s a good guy or bad guy, but I guess we’ll see eventually.