If Sephiroth's appearance in the first Kingdom Hearts wasn't canonical, then if they remake it, they can add Tifa in a similar fashion. In my opinion, she's the least promoted out of all of her fellow VII cameo characters. She doesn't even have an official artwork yet, because her KHII appearance was pulled straight out of Advent Children, which I think is disappointing. But enough about that, let's gets back to theories.

What about Cloud's relationship with Hercules and Hades?