“We’ve been in discussions with Atlantis, and they have an option on the land next to the Aulani,” Richards said, referring to a vacant beachfront property neighboring the Disney resort at Ko Olina. “I don’t know if it’s going to happen or not, but according to them, it is going to happen.”Sources:Atlantis Resorts company is working out the final details of a deal to build the resort on a 15-acre parcel of land on the Diamond Head side of Disney's Aulani Resort, sources said.
http://www.travelweekly.com/Hawaii-Travel/Is-an-Atlantis-resort-headed-for-Hawaii
http://www.hawaiinewsnow.com/story/31036988/2-billion-atlantis-aquarium-resort-being-finalized-at-ko-olina
Maybe the design of Atlantis Hawaii will be similar to Sanya's design where there's a single tower that takes up less land and the majority of the land is used for the animals/waterpark.
Source: Google