Just my mind running over things but I thought that we know from the announced capex cycle that SeaWorld Orlando will be recieving large investments in 2018 and 2020. With the previous report of Dolphin Cove going down in September, it makes me think that this could be their plans for that area as a new attraction for 2018:https://m.youtube.com/watch?v=-hgLhgDOa1M
Anthony says, "new ways to experience our animals" in the video, and at that point there is a photo of some sort of vehicle dark ride attraction, with views into a dolphin habitat that strikes me personally as looking very similar to Dolphin Cove in Orlando. To the north of Dolphin Cove there is a good portion of mainly undeveloped land that could be used to house the ride portion of this attraction.
Just a theory, but the timing of the Dolphin Cove closure fits perfectly with the 2018 opening timeframe, especially since CEO Joel Manby says he wants to open new rides in March instead of Summer in the future. Plus we have that released image of a ride vehicle moving past a dolphin habitat