I tried out WAR when it first came out and tbh it's pretty fun. Coming from a WOTLK BETA tester this is basically how I feel about the two...

WAR is more fun than BC.

WOTLK is more fun than WAR.

I expect WAR to make it though. I doubt it will fold like alot of other recently over hyped MMO'S. Will it be a WoW killer? No.