The originals to the alleged Xenias screenshots are here and here. They are hosted on Deviant Art, an online art community. They are by two different artists and were posted 7th of June and 4th of January, respectively. Of course, it doesn´t necessarily mean the pics are fake. But let´s not cling to straws, shall we? For all intents and purposes they are.
Thanks to Kraid for finding these links. I had also seen them posted on this Gamespot forum thread courtesy of Ser69 - who also originally posted them there, interestingly. Don´t know if they were first posted on Gamespot, though. But maybe he actually cropped them and added the logos. Who knows?
One interesting sidenote: that banner reading Revolution is actually in the original itself. Ah, well. One of those things, I guess.
Also, young master McWilliam has updated his site NintendoOn.co.uk. No more flash animation. There´s just this Nintendo logo with two blue spheres, one smaller than the other. They could be meant to resemble the official Rev logo, in turn resembling both Gamecube and standard size discs.