http://www.agot-genesis.com/
Based on a series of fantasy novels that has been going since the '90s, and designed under the supervision of the author, with production values unusually high for a Western turn-based strategy game, it is perhaps the most promising new title currently available in the genre. This little clip tells the whole story:
http://www.youtube.com/watch?v=TwRQZNk2LrY