Plenty of games, DLC, expansions etc are announced without having passed cert, that's what happens in the games industry. Most games are announced with an approx launch date well before they are sent for cert, usually before they even alpha. So yeah WC would announce it early because that's a pretty normal practice in the industry, especially if they're sending the update to multiple platforms with the update for one of them ready for launch.
No need to be rude about it.