You are not imagining it. IN fact, I think he mentioned as far back as 2017. He said they weren't sure if it would be released in album form or make it a stage musical. I am not sure why they can't do both! If they go the musical route I hope they at least make it available for fans that can't travel across the world to see it live, at least a Fiery Maze-type stream would be better than just reading a review of it, like some of Tim's other projects.