Supposedly the Spanish Sonic fansite went through the files of an early copy of Sonic & All-Stars Racing Transformed (I can confirm that copies of the game are being sold early as I got it myself today), and among the files was a folder with textures for the Team Fortress 2 characters Pyro, Spy and Heavy:
They're not playable in the Xbox 360 version, so it looks like they'll be exclusive to the PC version of the game. They also found out that
and that the final unlockable character is
Also files for Alex Kidd (who isn't playable), Football Manager and Shogun: Total War were found.
There is currently no release date for the PC version, so hopefully it won't be like with Renegade Ops and Sonic CD where SEGA where there is a lot of confusion about when it will actually get released. This also wouldn't be the first time that a Valve character is playable in a SEGA game, as Gordon Freeman was playable in the PC version of Renegade Ops: http://store.steampowered.com/app/99300/
Here is a trailer for Sonic & All-Stars Racing Transformed for those who don't know what it's like: http://www.youtube.com/watch?v=8tjeDF-_nPE
http://www.sonicparadise.net/2012/11/hackeados-los-datos-de-sonic-all-stars.htmlassets/default/characters/teamfortress/sourceimages/tf2_heavyboat_parts_spec.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_heavyboat_parts_norm.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_cp_green_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_heavyboat_parts_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_litsphere-chrome_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_heavyboat_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_heavyboat_spec.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_pyrocar_spec.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_wheel_norm.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_wheel_spec.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_wheel_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_pyrocar_diff.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_cp_orange_diff.tga.texture
ssets/default/characters/teamfortress/sourceimages/tf2_spyplane_spec.tga.texture
assets/default/characters/teamfortress/sourceimages/tf2_spyplane_diff.tga.texture
They're not playable in the Xbox 360 version, so it looks like they'll be exclusive to the PC version of the game. They also found out that
Segata Sanshiro makes a cameo(s?) in the game
called Segabot.
There is currently no release date for the PC version, so hopefully it won't be like with Renegade Ops and Sonic CD where SEGA where there is a lot of confusion about when it will actually get released. This also wouldn't be the first time that a Valve character is playable in a SEGA game, as Gordon Freeman was playable in the PC version of Renegade Ops: http://store.steampowered.com/app/99300/
Here is a trailer for Sonic & All-Stars Racing Transformed for those who don't know what it's like: http://www.youtube.com/watch?v=8tjeDF-_nPE