http://www.creative-assembly.com/sega-and-creative-assembly-announce-partnership-with-games-workshop-to-create-warhammer-games/ So, if you follow the link above you'll go to the creative assembly page that contains information on their future partnership. So, if you know the Total War games (Like me) you'll be very excited about a
Warhammer: Total War game without needing mods (and the long and arduous process needed for that installation.)
From first glance it looks like it'll only be a Warhammer Fantasy Battles themed game for now, but we might eventually see a Warhammer 40,000 game, which opens up the availability of huge apocaliptic battles in custom games.