Ideas are never abandoned. They’re always in the compost heap, and they always turn up. To use a gardening metaphor, I’m always in there with a pitchfork turning things over to see whether the time is right for something to become fertilizer—”Oh, that idea. I can finally use that now.”
But what if you could design a new story+characters+universe that was meant to work across all the above? Imagine something designed to be a book and a TV series and a movie and a theme park ride and a game and have it be possible within the storytelling and universe of the IP itself.