AMDZone has now posted the press release officially announcing Quake IV and the untitled Nerve Software project that were unveiled at QuakeCon earlier today (story). A concept image of the gladiator character from Quake IV is also included. Here is an excerpt from the full press release:

New titles announced at the press event include Quake IV, currently in development by long-time id Software contributor Raven Software, and an as-of-yet unnamed project in development by Nerve Software. Both games are executive produced by id Software and published by Activision, Inc. (NASDAQ: ATVI).

"It's going to be a ton of fun to be working with the guys we know so well at Raven on Quake IV and the new team at Nerve is a real up-and-commer in the industry," said Todd Hollenshead, CEO, id Software. "With Return to Castle Wolfenstein, the new DOOM, our collaboration with Nerve, and Quake IV on the horizon, gamers have loads to look forward to."

Quake IV marks a return to id Software's trademark single-player gameplay experience through the extension of the Quake II universe, and will use the company's advanced new DOOM game engine.

The project being developed by Nerve is based on an original design by id Software. The game is still in the early stages of development with more details to be announced later this year. Nerve Software was co-founded by ex-id Software employee Brandon James.