When Kill Bill was released, there was an interview with QT in a French magasine (Telerama) where he mentionned a script that he started between JB and KB but never finished. The basic plot is: "two brothers forget to wake-up the morning of their father's funeral". For a while I thought that this might be the Vega Bros project but eventually, I don't think it is. He said that he needed some time before finishing it. Ever heard of that one?