Sean Penn has no direct connection to 'Pulp Fiction' as far as I know. He wasn't in the movie. 'Pulp Fiction' is a Quentin Tarantino classic known for its unique narrative structure, great performances by actors like John Travolta and Uma Thurman, but Sean Penn wasn't part of it.
As far as I'm aware, Sean Penn has not worked with the cast of 'Pulp Fiction'. Each actor has their own career paths. The actors in 'Pulp Fiction' have mainly worked within Quentin Tarantino's film universe or in other projects separately from Sean Penn. There is no record of any collaboration between them in relation to 'Pulp Fiction' or otherwise.
I haven't heard about which specific role Sean Penn declined in Pulp Fiction. It could be that the details weren't made very public or I just missed that piece of info.
I'm not sure if Sean Penn is currently writing a new novel. There might be news about it in the entertainment or literary sections, but as of now, I haven't heard anything definite.
I'm not entirely sure specifically about star stories that involve both Kevin Bishop and Sean Penn. They are both actors with their own body of work. Sean Penn is known for his intense acting in movies like 'Mystic River'. Kevin Bishop has his own set of performances. Maybe there could be a story about a possible collaboration that was considered but never happened, or perhaps some event where they were both in the same place in Hollywood.
Some critics might praise Sean Penn's novel for its unique narrative voice. His personal experiences in the film industry and life in general could bring a distinct flavor to his writing. The way he describes characters and settings might be highly regarded.
Since we don't even know if he is actually writing a new novel, it's hard to say what to expect. But if he does, perhaps it will draw on his life experiences, his views on society, and his interactions with different people, just like many authors do.
One possible story could be about their influence on different generations of actors. Sean Penn has been around for a long time and has influenced a whole generation of actors with his acting choices. Kevin Bishop, being a bit younger, might have been inspired by Sean Penn's work. Maybe he watched Penn's movies and was motivated to pursue a certain type of role or acting style.