File this under idle speculation:
The rumor on the web this morning is that the developers of fondly remembered (and still played by some) MMO Shadowbane are creating a massively multiplayer Wii game.
Here's the evidence: Stray Bullet, the creators of Shadowbane, are working on a new MMO. At the same time, they've posted a few openings on job boards for a Senior Programmer for an un-named Wii project, and the other for a Gameplay Programmer for an MMO project.
We find it tough to swallow the idea that the Wii could support an MMO-- online components haven't been stellar--but we, like you, will wait and see.
Massively.com: Shadowbane dev studio to create MMO for the Wii