We will have to see what is in the game after the game comes out and we can see for ourselves. But, I do believe I remember id throwing something together quickly just to get the p2p working solely for demonstration.
I've been closely following first person gaming since Quake came out, and even spoken with ToddH and exchanged emails when I was running the old deathmatch database on PlanetQuake back in the late 90's, to the extent that I was selected to post the review of Quake2:Ground Zero that made the front page of Gamespy...it was my 15 minutes of fame...probably the only that I've ever get...if you want to ask why I mention it.
ToddH is the CEO, and as such he directs where the company resources would be best deployed, and what projects should be produced. Of course since Doom3 is actually being boxed up for shipment, we know that John Carmack and the other veteran id members can influence Todd's direction. Also, ToddH and Carmack seemed to have agreed that the focus on Doom3 would be the first person game...John said as much in the interview we saw yesterday. This is indeed the exact same process that John used in the original development of Doom. The interview also revealed that the current focus of idsoftware is on multiplayer Doom3, just like what happened with the original Doom (though I'm usure whether they did a second episode before adding multiplayer).
The point I'm making is that no matter what MP aspect is in the game that ships, it is definitely NOT the MP Doom3 game, but just the code leftover from Quakecon. Do you really think that idsoftware would just make a 4 player MP game?
Another thing to contemplate is that after MP Doom3 is released ToddH is going to move id into the project that he wanted to do before work on Doom3 began. Nobody knows what that project is yet, but any sequels to Doom3, such as mission packs, mods, etc. will be generated by other people. I figured that Rogue Entertainment would want to do a mission pack, but they have virtually disappeared! Apparently United Developers bought Rogue and then killed it to collect on the estate. I have not heard anyone stepping up to claim any work on a mission pack, but who knows? Blue? I see that RavenSoft who developed Hexen2 is working on Quake4 if you can believe that, so instead of a Doom3 mission pack we may see a title named Quake4 backed by the Doom3 engine...sweeet!
Let's Rock!