The dismal reviews that the Doom movie is getting so far-- check Metacritic.com for a summary-- normally don't have anything to do with Bungie or Halo.

However, when the Halo movie is finally released, the comparisons will be inevitable; Doom was the first popular first-person shooter, and Halo is the most popular Xbox shooter.

So I got a kick out of this quote in the Austin Chronicle's review of Doom:

Doom is based on a wildly popular video game – not quite as popular as Halo, mind you – and its plot reflects that. Briefly, a portal to Mars is discovered in the Nevada desert and, before you know it, American scientists are up there being devoured by God knows what.

Call me crazy, but I think that the combined shareware and commercial success of Doom, Doom 2, and Doom 3 (for the PC and the Xbox), might actually give the Halo franchise a run for its money, popularity-wise.