Rumor Hour: Banjo in the Driver Seat?

Box art has surfaced for Sonic & Sega All-Stars Racing for the 360 depicting Banjo of Banjo Kazooie fame in the game. The first thing that jumps out to me that this might be fake is the front cover saying XBOX LIVE instead of just LIVE like modern games now do. This has yet to be confirmed or denied by Sega or Sonic Team which is why it is best to treat this as a rumor for now.