******* Confirmed plus possible character roster.

This I found on Serebii.

Here of some possible screenshots for the subspace emissionary




And here's a possible screenshot of character roster, including: Mr G&W, Marth, Luigi, Ganondorf, Falco, Captain Falcon, ROB, and Young Link (WW version)

Found some more proof. This site has links to images and videos.

http://blogs.ign.com/Next-Gen-Gamer/2008/01/29/78697/

the guy supposedly got an all characters unlocked screen.

This looks..... believable.

And for even more proof, look at the character select screen posted today on the dojo



Mysteriously though, Snake and Sonic aren't on here...