"And would it really be a good idea to list the third party ones? If you tell your competition exactly what games third parties are making for your system, all it does it give them a chance to go over to said third party and throw around a bunch of money hats to get the game on their system too."
That's being pretty paranoid. If Nintendo's going to be THAT scared of having stuff stolen they might as well never release anything. Even if Sony or MS did that I think it would be worth it for Nintendo to establish that the Rev has some decent third party support. That's been Nintendo's big problem for several years. It's worthwhile for them to look like the third party situation is improving and the only way to do that is to reveal third party games.
Plus I doubt they've listed pretty much all the first party games. They've announced SSB and Metroid. Two games. I'm pretty damn sure they have more than two games being released within the first six months. The Cube had a pretty thin lineup for the first couple of months but it at least had four first party titles during that time. Nintendo has said that they feel the post-launch drought really screwed up the Cube so I imagine they're going to make some effort to prevent that. That means there are other first party titles under wraps.