A cancelled concept art for Kingdom Hearts 3 release on iOS was salvaged from the wreckage and suggested the new worlds that the game developer might have planned in the next game feature within the Disney universe.

Fans can go and check the reported concept art cancelled in this link here.  

The purported new worlds include Agrabah, Alice in Wonderland, Neverland, the mines in Snow White, the Sugar Rush world from Wreck-it Ralph, Lilo and Stich's Hawaii, the Frozen outskirts past Arendalle, what looks to be the Death Star, the castle town of Tangled and a Tron world.

Meanwhile, media reports have published Square Enix's move to replace the Luminious Game Engine with using the Unreal Engine 4 technology in developing the next title to the game franchise..

In his interview with Eurogamer, co-director and game designer Tai Yasue shared how his team has been using the Unreal Engine 4 as the design engine. 

"The technology is moving forward a lot," he said. "That's something we've learned from the West, I think, in a big way. We're using Unreal Engine 4 right now, and that really has changed the way we make the game."

Yasue cited that there was no problem using the  Luminous game engine but reiterated that the Unreal Engine 4 was the better fit for Kingdom Hearts 3.

"There was nothing wrong with the Luminous engine at all," Yasue revealed. "We decided that Unreal 4 was right for us. There was a huge network of people actually using it, we were communicating with the Japanese people at Epic a lot - it was like a complete product."

As to the 'Kingdom Hearts 3' release date is claimed to set by Square Enix to be on February 2016 and that tons of new details about the game would be unveiled at E3 2015, Cyberland reported. 

The site wrote that Kingdom Hearts 3 would be released by February of next year and fans can look forward to the upcoming E3 2015 event this June for gameplayers and cinematic trailers.