In an interview with GamePro (spotted by Eurogamer), Tim Schafer confirms that more DLC for Brütal Legend is on the way - both multiplayer and single-player, hopefully continuing the rather abrupt end to the story.
There's also Tim's explanation for the very late announcement of the game's strategy elements, Tim's major gaming influence on BL, and why Tim Curry played Doviculus. Obligatory second linkage!
Source: Eurogamer