The man who owns my LGS used to work at GW in England, he got to be good friends with a man who is now a developer. This developer sent him an E-mail with some info on the new army. When I brought up the possibility of a new race emerging to some of the other guy's who were playing warhammer with me he called me into his office and showed me his e-mail, though I am not supposed to tell anyone what was seen. Let me tell you, this is going to be fantastic
The only problem being is that GW might not make it tourney legal, they are bringing out 2 new rules sets near the end of this year.
The first one is going to be a rule book for tournaments, it will include restrictions on numbers of certain types of units that can be taken, limits on amount of power dice depending on your points level and restrictions on how many ranged weapons that you can have. There is a lot more going to be in it but that is the basic jist of it.
The second one is for an Apocalypse style warhammer.
This new army will only be available in the current rules set which will be basically for friendly games (possibly).