Upon second glance, it appears that the "27 titles" quote was kind of cheap from Nintendo. All those WiiSports games are being counted separately, and a couple of those things don't appear to be actual games. (I suppose those first three are pershaps built into the Wii?)
However, it is really great to see WiiMusic, Sonic, Necro Nesia, SD Gundam, One Piece, and Bombermanland ready to play. Could be launch titles.
Meanwhile, the absense of Square Enix tells me that they WON'T, in fact, be launch titles.