id has announced the first expansion pack for Doom 3 which will be called Resurrection of Evil. The pack will be co-developed by Nerve Software and id Software (Nerve has developed an expansion pack for RTCW) and will feature "new locations, characters and weapons, including the return of the double-barreled shotgun".
Building on the most advanced game engine ever created, DOOM 3: Resurrection of Evil continues the frightening and gripping single player experience of the blockbuster original. The title also features even more multiplayer action with support for up to eight players in all new maps.
So this is not only good news for fans of Doom 3's single play (and fans of the super shotgun) but also fans of Doom 3 multiplayer. Yes, all both of you. I kid, I kid!
Update: A tentative release date of March 2005 has been set, but take that with some salt (source is Chris Morris from CNN, so pretty reliable) and stuff. Thanks Shacknews. - Cyb