More Borderlands DLC imminent
Ahead of an official announcement from Gearbox, new Trophies appearing on the game's list point to the release of a new downloadable expansion pack soon.
Five new trophies tied to completion of coliseums not in the main game are undoubtedly part of a new download to be released before the end of the year. PS3 Trophies lists the coliseums - Hell-Burbia, Angelic Ruins, and The Gully - and mentions lesser and larger challenges to be completed in all three.
Gearbox has not mentioned the expansion pack, so it's difficult to discern whether it will be a paid download (likely) or free update (highly unlikely, though much wanted). We've contacted Gearbox for confirmation and will update when we hear back from them.