So here are the reasons I think WAR is going to be great (in no particulare order)

1. It's Warhammer

2. It(Warhammer) has 25 years of backstory and development

3. Carrie Gouskos is one of the people making it

4. Paul Barnett is the Design Manager

5. Jeff Hickman is THA BOSS

6. They have a lot of fun making it

7. Games Workshop is very active in the development of the game

8. They have both money and time to do this right

9. There is no end to it (no victory, no defeat)

10. Pauls brother, that other Barnett bloke is also in on it (the beta anyways)

11. There is WAR EVERYWERE

EDIT:

12. The devs have cute Pegasuses and bunny-rabbits as avatars 

can you think of any other reasons this will be great?