According to the producers of The Simpsons, Fox wanted a spin-off for Otto Mann, the school bus driver for Springfield Elementary. The producers weren’t too keen on the idea.
Otto got a single spotlight episode, and after that he more or less faded into the background. Oh well. Maybe the Fox executives had the same sort of realization Otto himself had when he stopped to think about how his father told him he’d never amount to anything if he just goofed off playing the guitar all through high school.