Was aSchumacher video where they talked about his desire to do Year one. Watching Falling Down now (first time) and Schumacher would actually be a pretty good fit at adapting Millers work. The social commentary is quite similar and the film suprisingly has a comedic edge to it (much less subtile than his Batman films).
It actually feels ALOT like phone booth.
I could actually see him doing a Dark Knight returns as well.
It's weird that Schumacher could have read and liked Year One and yet in directing his Batman films encouraged, directed the actors that We're doing a cartoon! well I guess with his films he was openly focusing on the '50s-'60s versions but I don't know that he then could have done something really different a few years later.
I do like Falling Down and Phone Booth (and A Time to Kill) but he probably did seem them as just very different kinds of films.