(I say in another thread but I want to say again. in the right place.)
It all gematsu again... Anyway, I don't think is fake yet, but Yesterday PotD reveal that it have is error. It walking in the true path to become real with few Random trippings and Traps set by Sakurai to become fake. And he already trigger the first trap but survive by luck.
I don't think the POTD exposed an error at all, and for 2 reasons.
1. Many of the places the leaker mentioned clearly weren't going to be the final titles, rather just a location and/or game. "Gamer" is such an example of a course that was likely named late in he process since it doesn't actually have a proper name like some of the others would, such as Gaur Plains.
2. We honestly can't be overly critical on names especially when the leaker's access ver easily could have been to the Japanese version, just as most the other leaks started as. The leaker obviously hasn't been given extreme information about the game, and 'final' exact stage names for English release is an example of this. Besides, Duck Hunt was labeled Duck Hunt Dog for ESRB, and later became Duck Hunt? We can't discredit something because the name is off, "Green House", as he called it, clearly wouldn't have been the final name, but damn was it spot-on.