While he never mentions Warcraft in the Tweet, I think it’s pretty safe to say he’s onboard. I expect we will see a press release for this today.
While I haven’t seen either Moon or Source Code, they are on my list. Especially Moon. I’ve heard great things about it.
In my opinion, giving a huge budgeted fantasy franchise like this to an indie director is an interesting tactic. After all, it worked for Peter Jackson and The Lord of the Rings films . . .Honestly, very few people knew who Jackson was before LotR.
I will keep you posted as more info is released.