Designer Graeme Devine at id Software updated his .plan addressing the rumor of the day, saying that id is not doing a Matrix game (which, if movie adaptation history serves as an indicator, will be some crappy side-scrolling console game and port produced in 72 hours that will sell a million units anyway). Here's the update:

I see a lot of people are playing with nude reptiles!

We are not doing a Matrix game. When we finish Q3A we'll start on the next project. We will try and fit the words "welcome to my underground lair" into the next game, mostly because we think Steed would be good at making fembots.

Okay, that's more of a suggestion than a truth. We'll probably do something completely different based on stories of the Quake 3 Bus and the Nevada desert.