Yeah, indeed. I just tried it and even the latency (ms) is still as I would play on Europe. Tho, Warzone is a free to play game and the free download is probably constructed so battle.net account region doesn't matter. It could be different to actual game purchases. What I want to say: Is there an option, in case it indeed turns out it doesn't work on release then, to get refund / EU key? I'm trusting you on this... :D