It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
There could be various fanfictions. Maybe some that focus on alternative endings, like ones where certain characters survive who didn't in the original. For example, a fanfiction where Erwin survives and leads the Scouts in a different way.
One common theme could be the exploration of unexpected relationships. Since mpreg is involved, it often delves into how the characters deal with the non - traditional situation of male pregnancy. For example, how the relationship between Harry and Draco might change due to this new development with Zeke in the mix.
Pulp Fiction is a complex and iconic movie with a lot of memorable characters. However, Zeke and Zeb are not characters that are typically associated with it. It's possible that there is some sort of misinformation or a very niche interpretation where these names are related, but in the general understanding of the movie, they don't exist within its world.
One popular Zeke and Luther fanfic is 'Adventures of Zeke and Luther: The New Beginnings'. It focuses on their new skateboarding tricks and challenges in the neighborhood.