Its appearance in KH4's trailer shows a look at the area, inspired by real-life Shibuya, that serves as Sora's waking place following the events of Kingdom Hearts 3. Acting as an "afterworld" for ...

We also know that some of Kingdom Hearts 4's story takes place in Quadratum, a world made up of neither light or dark that might take place outside of the realm of reality and resembles Shibuya in ...

and the clear visual references to actual locations like Shibuya's 109 department store. Others looked to the render of Sephiroth as a sign of his return to Kingdom Hearts after appearing in ...