Well I didn't see this coming! Bethesda has announced a definitive collection of the Doom series. Not only are they re-releasing Doom 3 with expansions, they are also bundling 1 and 2 with it.
BFG adds Doom 3, Resurrection of Evil, and "The Lost Mission"--all optimized in 3D, 5.1 surround sound, achievements, improved rendering and lighting, and a new checkpoint save system. There's also an armor-mounted flashlight, "allowing players to illuminate dark corners and blast enemies at the same time."
Doom 3 BFG will be released on October 16th for PC, 360 and PS3 and will be priced at $40 for consoles and $30 for PC.