Eve Online developers CCP have filed two new trademarks pertaining to online gaming: Dust, and Dust 514. And it could be something Eve-related, but that's totally a word I would use were I trademarking a post-apocalyptic game world. Actually I'd probably call it "Dust Tribes", for the vehicular combat vibe, but that's just me (Omg, to the trademark factory!) There's loads of speculation flying around about this at the moment - particularly since CCP showed an FPS prototype a while back - but we don't know anything more. We're expecting something to be revealed at the Cologne games Con, where the CCP bossman is going to give a keynote.
Needless to say, if CCP do end up making a post-apocalyptic PvP-focused MMO, my life will be ruined.