A video on GameSpot from the other day offers a 30-minute retrospective on id Software as the developer celebrates its 20th anniversary this year (the Wikipedia states they formed on February 1, 1991). The clip is captioned as a chat with the company's founders, but the only actual founder they hear from is John Carmack, though the piece also features comments on id's games and history from long-time standbys Tim Willits and Todd Hollenshead (thanks Auger). Along with the nostalgia, the clip concludes with an interesting comment about the future from Todd Hollenshead, who says with a smile that fans of id's various IPs will be rewarded down the road:

For the future, of course, our big focus is on RAGE, and that's coming out this fall, and so that's what we're all focused on here. But you know looking in the, sort of the crystal ball, down the road, DOOM [4] is in development obviously, and so that's something we're going to look forward to a future release. We continue to grow the studio to look to explore the other IPs as well, so for, you know, QUAKE, Wolfenstein, RAGE, DOOM, you know, those are four brands that we're very fond of here that we anticipate working on and having an affiliation with as we go forward in the future, and I think the fans of those properties are going to be… their patience will be rewarded, let me say that.