New VII Remake Ultimania reveals SE doesn't know how long the remake will be.

[Fynn]

That said, there was enough interest there for the story to continue.

The argument here isn’t “KH continued so FFVII’s story will be coherent”, the argument is “SE has made a long-running series of games with a continuous story that sells super well, and since FFVII is a big brand it’s very unlikely it’ll get canceled in the meantime”