I played a game for original xbox 8 years ago. Game was called "Deathrow" -- like death row, or death throw... information here: http://en.wikipedia.org/wiki/Deathrow_(video_game) I ALWAYS thought that an XBLA game based on that premise would be a PERFECT fit. After reading up on Uber Entertainment and seeing their plans for Monday Night Combat, I think this team could pull it off. You could use the same player "builds" and run with it. (for the link impaired)
Looks pretty good. In my experience sports games are only fun if you can beat the crap out of the other players.