No other details on the game were revealed, though a short teaser trailer, detailing a more realistic aesthetic than the cartoony original, was shown.
Update: Microsoft has confirmed that, as rumored, upstart Ruffian Games--a new studio that includes Crackdown veterans from original developer Realtime Worlds--is handling development of the sequel, with the game due out in 2010.
The follow description of the game was also provided:
The sequel to the award-winning Crackdown, "Crackdown 2" is the premier open-ended action experience that lets you be judge, jury and executioner for a vast city. Coming exclusively to Xbox 360 in 2010, "Crackdown 2" will take multiplayer gaming to unprecedented levels for the ultimate cooperative and competitive multiplayer experience, providing you and your friends with the complete freedom to explore, destroy and play as you return to restore justice and peace to Pacific City--by any means necessary.