I'd rather not say who but I will say that the person does not work for or with D&D.
Well, it might well be real. But look at what's there.
Smoke and Mirrors, v6 - check.
Black D&D card from Smoke and Mirrors, v6 - check. (Remember that card?)
Similar card in white - check.
Did ANY of the previous S&M releases have a card like this white one? I've only got from versions 4 through 6.
If so, there you have it, it's real, but has nothing to do with S&M v7.
If not, then maybe the guy photoshopped that one card, but the rest is legit. And it STILL has nothing to do with v7.