I'm bumping this because I had an epiphany while cleaning my kitchen.
A U2 music-based musical could definitely work. But you'd have to think about how best to do it. Across the Universe created a love story spanning music from The Beatles' entire career. But you could almost create an equally entertaining story from a single U2 album... because Achtung Baby already tells a story
Picture it: Berlin 1990, the world has just changed, and our main character is changing with it. He wants to go out and see this new world, spend the night partying, and is so intent on this new freedom, that he doesn't care if he leaves his wife at home.
So we open with a train pulling out of a Berlin station and headed toward... you guessed it, Zoo Station, with the guy on board singing about everything what a good time he's gonna have tonight.
Yeah, you get the picture.
I think I'll go write it (anyone wanna be my co-writer?
) and then I can go find Wim Wenders and make him direct it