Also BGW seems to always be more private park. With that said, while other parks release their special event information very much early on, the park doesn't like to release information early. They like to hold on to it for as long as they can. Part of the reason being, they don't feel like they have to because there is no competition in their eyes. They expect their market to choose them irregardless of special event details.
With Blackfish, that totally ruined the concerts for BGT and SWO. Even though, things turned out fine it still caused issues. I would assume that BGW didn't want to have to go through the trouble of finding replacement artists or canceling concerts because artists decided to distance themselves from the park. Even though people seem to forget BGW is part of the SeaWorld family, the risk is still there.
I will say a lot of the damage is gone now. You see a lot more positive comments on both BGT and SWO's Facebook posts and walls, etc as opposed to the constant bashing earlier. Things have definitely gotten better, but in fear of that small risk something might happen, they may want to hold off on announcing concerts right away.
I personally think they may announce concerts on a monthly basis or announce them all at once just right before May.
