Quake IV Screenshots

The first officially released Quake IV screenshots can be found in an article called Looking Ahead to 2005 on Yahoo! Games Domain (thanks DemoNews.de) where they show off a couple of images from the upcoming DOOM 3-engine project along with a summary of how the plot picks up after the conclusion of Quake II courtesy of Raven's Eric Biessman:
After destroying the Strogg's collective brain and leader -- the Makron -- the Strogg have quickly regrouped under a new and more powerful Makron. However, with the Strogg's planetary defenses still destroyed, Earth's forces can deliver a full and final assault. This time you're not alone. An army of soldiers are fighting with you and an arsenal of weapons and vehicles are at your disposal. Quake IV delivers you deeper into the heart of Stroggos