If I could throw this question out there: why do you want it to be based connonly? I could understand wanting to keep the core cannon aspects of the thousands of people trapped in a game where the only escape is finishing it, and no magic only sword skills, but to be frank the story and how the Aircraft arc ends is rather rushed. I believe it could a better and more fulfilling story if instead of stoping with the cannon ending of heathcliff's reveal on floor 75, we follow all of our characters up until floor 100, the actual end of the game.