During promotion of the game, they tried to say it was going to be canon. But I think it got misconstrued by PR. I think the intention was that they wanted the movies of the pixar worlds to be canon to kingdom hearts, not the other way round. But they didn't state it as such.
I've read the books, played the games & seen the things that have been "removed" from canon, but are still referenced. The fact that you had to state "Current Disney Timeline" shows that there are multiple, and the current scatter point happens in a retcon.