In some cases, it could be the environment itself. For instance, if they are in a highly dangerous and unforgiving area, like a collapsing building or a toxic zone, and Ellis makes a wrong move trying to lead the group through, which leads to his death.
Perhaps in the fan fiction, Ellis is bitten while trying to protect a vulnerable member of the group. He then decides to isolate himself to avoid turning and ends up dying alone.
His novel 'Glamorama' is also very good. It satirizes the fashion and celebrity - obsessed culture. It's filled with glamour, paranoia, and a sense of the absurd as the main character gets caught up in a world of models, parties, and international intrigue.
As of now, there's no official word on Bret Easton Ellis having a new novel in the works. His previous novels have been quite controversial and influential, like 'American Psycho'. If he were to write a new novel, it would probably generate a great deal of interest among his fans and the literary community alike. But until there are some concrete signs, such as a publisher's announcement or leaked manuscripts, we can't be certain.