Wild West Theory: I don't think this 2D God of War Metroidvania exists. In fact, I think it was Tom's way of hinting at Marvel Tokon without spoiling the surprise of that game's reveal.
At least, that's what I'd like to say. And it would be a good thing for these insiders/leakers to do in the future because, TBH, they DO ruin a lot of the surprise of these big game reveals and it's almost impossible to ignore the leaks unless you stay offline and off social media.
It should be a new way for non-hardware related leaks to be handled by people who have the info, because I think letting the actual devs/pubs have that moment of excitement when they reveal big surprise & hyped games, is a good thing. It's their work, after all, let 'em have that moment.
Basically, stop spoiling major game reveals when the actual reveal's right around the corner. And try having some ambiguity if you're leaking stuff about the game way ahead of a reveal. Sure let the community know a thing or two but don't spoil everything ahead of the actual reveal.