I'm looking forward to it, although the inclusion of a female guardsman as a major character concerns me, but not for the reasons it does some people in this thread.
I'm not concerned that it will be a love interest situation.. lets face it, GW wouldn't let their Space Marine's show any humanity. I'm concerned that she is basically a GW tool for going "hey look, female!" I'd be greatly surprised if she doesn't end up either corrupted, or killed in some gruesome way.
GW's universe is overwhelmingly stuck in the "Power Fantasy of a Lonely Teenage Geek" design mode.
I grew up playing GW games, but the more you look at the lore the more you realise how overwhelmingly depressing it is. There are no good guys, and very little room for good people to function. "In the Grim Darkness of the 40st millennium there is only war" works very well for a table top wargame, but once you start extending that premiss into books, video games and roleplaying games, you need to start editing lore to allow the occasional moment of genuine goodness.
Some of the stories do a good job of it.. Gaunt's Ghost's, for example, have everything.. the horrors of war, the loss of whole planets, deaths of friends.. but they also have love, life and humour. Space Marine stories, which seem to be the only stories GW allows to be told in Video Games, or that developers get behind, are at the best tragedies, but normally just end up being the most generic, overwhelmingly zealous, warlike trash.
GW has made it so that Space Marine's are almost incapable of being decent, relateable, characters. They are both physically conditioned and mentally brainwashed. While they can think for themselves, the indoctrination means that if they go too far they are branded heretics.
So yeah.. I'm not worried about her being a love interest.. however interesting it would be to see a Space Marine struggling with the "heresy" of falling in love.... lets face it, it would get him a bolter to the skull as it would her.