Ready Player One, definitely! That movie is definitely dope and there's nothing better than making a video game out of a movie that is based on a game. All of the steps taken by the protagonist could be made into separate chapters, each with it's own mission objective. Like the movie itself, it shall have different quests that the player needs to go on to ultimately reach the final quest of getting the Golden Egg.
It can be either a PvE, where the player can choose to play with either one of the 5 heroes or the main villain in the story. Either way, it would be nice to have the final face-off against a real player, irrespective of whether you are playing as the hero or the villain.
To make things more interesting, it could also be developed as a PvP, where each of the five heroes are assigned to a five-stacked team and each will have dedicated roles to perform and skills to put to use without which the game won't progress. In the final stage of the game, pit the team of heroes against a real random player who has been playing as the villain through the storyline.