I am a huge fan of Doom. In my opinion Doom is one of the best video games ever made. It's pretty much classic go to a room, see a bunch of monsters, and then shoot them down with tons of weapons at your disposal. It brings me great joy to know that ID Software and Bethesda Softworks are finally releasing the forth Doom game, but it also leaves me concerned. There have been times where games have been in development for a while and turned out to be utter garbage (Duke Nukem Forever, Aliens: Colonial Marines), but sometimes they do turn out for the better (StarCraft II).
If you are interested in checking out the trailer, click on the link.