The Kingdom Hearts franchise gained tremendous popularity by capturing the hearts of not only fans of Square Enix, who is popular for creating the world-wide hit Final Fantasy series, but also the hearts of fans of Disney, which films became a part of everybody's childhood. Put together in one game and fans have their dream game.
Kingdom Hearts 3 rumors and theories just keep on surfacing one after another. From Frozen to Star Wars and Marvel character appearances, it is already too hard to distinguish the fact from fiction.
Nevertheless, making speculations for a universe as broad as Kingdom Hearts could be interesting whether it is true or not as long as one takes it with a grain of salt.
Now, a concept art surfaced online which is comprised of villains from different universe (see photo above). In this image, you can see Scar from Lion King, Maleficent from Sleeping Beauty, Red Skull from Captain America, Syndrome from The Incredibles, Loki from Thor, Thanos from the Marvel Universe, Davey Jones from Pirates of the Caribbean, The Evil Queen from Snow White, and Peg Leg Pete from Mickey, Donald, Goofy: The Three Musketeers.
As the series progresses, it would be interesting to see if arch villains from different universe team-up together and try to destroy Sora and the other protagonists. After all, Tai Yasue already said in an interview that Frozen, Marvel, and Star Wars universe might someday join the fray. See the interview here.
At the moment, this highly anticipated game is currently being developed by Square Enix and looking at its progress, it won't be long until Kingdom Hearts 3 gets released.