No they wont be back. After they moved the dolphins bonded with the other dolphins. They can't get more because dolphins can't be taken from the wild anymore so the only way to get more dolphins is for them to be born in captivity. That doesn't happen often so chances are slim they'd ever get them again.
Just to clarify, They had to remove the dolphins in order to repair the exhibit. Moving is really hard on the animals, so it was decided that once they got adjusted to the new place they would be allowed to remain there. It was sad to see them go, but good to see the zoo putting the welfare of the animals first.
Dolphin exhibit needed updates and the cost was too high. The dolphins were moved to another zoo. I havw not heard anything about it coming back.
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