Aw, damnit. There's not enough whining about "4 player only!?" deathmatch in this thread. Maybe people are starting to realize, that first they bitch and moan about id never doing anything different, then suddenly when id DOES do something different, they bitch about the change?
Four player DM (in Doom3) could work out nicely, quite nicely. More detailed environs, light and shadow, slower pace, etc. The atmosphere could be (read: COULD BE) perfect for it. I just hope there are good bots (out of the box). There will of course be other games out there that still offer large scale team play.