@Makoeyes987: That's exactly how I see Remake personally; there is absolutely nothing that says "hey, the OG has already happened!". I know people freak out because of Aerith, but if we follow ToTP, then it means that Aerith has absolutely no way of guessing the future anymore - them beating the Whispers was definitely the way to achieve this.
The only moment when I thought "OMG, Aerith knows she's going to die, OMG how does she know so much??" was during her resolution, and then Toriyama explained that she pulled an Aerith from the close future - meaning an Aerith who already died and saw the Lifestream scene happen! To me this scene is the one where Aerith post death tries to say goodbye to Cloud and shut up her feelings for him.
Remake happens the way it does because it tells the story of the OG AND the Compilation. You are supposed to get hints everywhere about what happened and what's going to happen in the future, because it's a retelling of the OG. So of course we know what happened already, and the game plays with that. With Aerith losing her powers, the next game is going to be interesting to follow. The only true unknown are indeed Zack and that Sephiroth from the future, that's about it.