Are we sure this is even actually the keep?

I don't recall him ever saying anything about an alliance challenge <_<
There's the "Alliance Tournament" in the game options, but that's just a funky name for Alliance Chat.

He was asked if we were allowed to gpq with people from guild alliance, but he said no. He also said that there would be something we could do with our alliances sometime. He didnt call it "alliance tournament" per say, but he sure referenced it.