It is pretty much confirmed that Mewtwo isn't playable. However, he may be a boss, and bosses do get their names displayed like the playable characters do in the Subspace Emissary.

Mewtwos a fake. Check this link:
http://img182.imageshack.us/my.php?image=1201672542336ms9.jpg

Mewtwo is a fake, just a manipulation of this: http://sukhoiaero.deviantart.com/art/Mewtwo-7541316

Good catch.

ok, I wonder if there will be a Pokémon boss. Mewtwo may be a pokeball pokemon now. lol

I like how there are 29 starting stages in Brawl, and in Melee, there are a total of 29 stages.

SPOILERS.

http://i259.photobucket.com/albums/hh286/KazeSSBB/live7.png

If that doesn't work:

http://s259.photobucket.com/albums/hh286/KazeSSBB/?action=view&current=live7.png

The 37 Confirmed Stages:

NEW
Battlefield
Final Destination
Isle Delfino
Luigi's Mansion
Mushroomy Kingdom
Mario Circuit
Rumble Falls
Bridge of Eldin
The Great Sea
Norfair
Frigate Orpheon
Yoshi's Island
Battleship Halberd
Lylat Cruise
Pokemon Stadium 2
Spear Pillar
Port Town
Castle Siege
Wario Ware
Distant Planet
Smashville
New Pork City
The Summit
Skyworld
Mario Bros.
Flat Zone 2
Pictochat
Electroplankton
Shadow Moses Island
Green Hill Zone

RETURNING
Temple
Yoshi's Island
Corneria
Onett
Brinstar
Rainbow Ride
Big Blue

Your pic doesn't work Bacon, WE NEED A MIRROR!

It is working fine for me. I am currently using Internet Explorer because for some reason Fox's Up B (see wut I did thar?) isn't working. :-/

The guy who predicted 35 characters also predicted 41 stages.

Electroplankton stage ey? could be cool.... has anyone posted a pic/vid of it?

Also thanks Ben for the answer about the characters... I didn't know there was a random option. (I couldn't reply before due to locked thread)

Here has new pics and confirmation of wolf
http://www.joystiq.com/2008/01/29/super-spoiler-bros-brawl-major-leaked-roster-update-videos-a/