In my personal opinion, and I won't act like an award-winning script writer or game developer, all you need to do is do a little bit of a remake of the first part of the game from the first part 'till the "edgy demon MC" scene. The problem is that I do know how nightmarish it will be so... I don't know. Just rest a bit and plan your work, Stronk. You can make it, we all know it.