I dunno. I didn't think it would be Zelda at first, but the more people talk about it, the more it fits to me. They were going to show it at E3, but decided against it; then Aonuma was going to show it at Comic Con, but didn't have time to "prepare" it. A VGX reveal just makes a lot of sense.
It basically has to be something that tends to sell better in America than in Japan, so I could see Metroid or Star Fox making an appearance instead, BUT there's no indication that these games are currently in development, much less ready to be shown. A new Bayonetta 2 trailer makes a kind of sense, but I think for a VGX surprise, it ought to be something we haven't seen before -- plus, I don't think Bayonetta 2 is coming out within the next 4 months, making a sudden marketing push kind of pointless.
