Well, they might have a deep conversation about their different views on the world. Eren could try to convince Zeke of his more radical approach to saving the Eldians, while Zeke might push back with his own ideas of euthanasia for the Eldians. It could be a very tense encounter.
They could start to plan a strategy to deal with the Marleyans together. Since both have their own experiences with Marley, they might come up with a complex plan involving Titan powers and political manipulation. For example, using Zeke's position as a Marleyan weapon and Eren's influence within Paradis.
I don't know for sure if 'zeke pulp fiction' is a book or a movie. It could be either, or it could be something else entirely like a short story, a graphic novel, or even a stage play.
Well, if 'zeke' is a person or a specific creation within the context of 'pulp fiction', it might be a story full of action, mystery, and maybe some noir - like elements typical of pulp fiction. Maybe Zeke is a detective or a criminal in this fictional piece, but without more context it's hard to say for sure.