Nintendo Power has a small article announcing Geometry Wars Galaxies on The Wii and DS.
It’s being handled by the developers of Battalion Wars, and will feature an extensive single-player game. Wii version will use the motion control, and DS will use the touch control. This game is exclusive to these platforms (…for now). Each version will feature a multiplayer mode. Both Versions from Retro Evolved will be included.
Expect this to hit this fall.