Fck, I was wrong
Yeah, well you were right to think that Legion will be released in June right after the WoW movie, cos that would be the most logical think to do in order to attract old players back to the game. However you were stupid to think that Blizzard will ever do anything logical.
Meanwhile in Blizzard's HQ: "Hey guys lets show them the WoW movie in June to get them hyped up, but lets give them the new expansion 2 months later, so that everyone plays WoD and see how grate the game is! And 2 months later we will give them our new expansion because they will love WoD so much in their 2 months gameplay that they will want to try Legion for sure!"