My only guess here is that WWE is kind of playing into a parody of themselves. Like, "lol, everyone thinks we're dumb, so let's do the dumbest thing possible." Maybe every week Brodus Clay will have a new ridiculously corny gimmick, or maybe they'll come out that Big Johnny wouldn't let BC premier until he had a gimmick that would sell with the kids, so BC gets frustrated and becomes a monster.
But to be honest, selling Brodus Clay as a monster wrestling machine is so fucking obvious, I don't see why they had to do this at all. I get that we're in the reality era now or whatever, but fuck, BC as a monster is soooo easy to sell. Ugh.
That's my guess, though I kind of hope they keep with this one, because it's god damn hilarious.