If I'm not mistaken, the game's director, Tetsuya Nomura, said he would not be interested in working on FF VII if it were a mere remaster. He believed that the HD version of VII that was released on PC, Playstation, etc, to be the remaster. For him, the game needed to be different.

The problem is that Kingdom Hearts, the last time I checked, made no sense. So yea, be worried.