Something I'd like to see done is stories done with surviving film Predators or flashbacks with older ones. What was the Assassin like pre-augmentation, was it only just Jungle Hunter in Val Verde or did he bring anyone or anything with him (we know the locals knew of him), what did the blood feud between the Jungle and Super Predators look like, did anybody ever try to reclaim Wolf's pistol?
I'd love to see the writers follow up on things like that. And there'd be an audience for adventures with the Lost Hunters be it before or after City Hunter's death though one I'd find cool would be showing at least part of City Hunter's funeral. That's something that would be real cool for world building since we've only seen so much of that. For a species kind of obsessed with killing it'd be interesting to see what they do outside of nuking a body.
Edit:
Due to Marvel having a What If? line of books, what if Marvel did something like that for the Predator comics? Like if Jungle Hunter succeeded in killing Dutch then the OWLF has even less to work off of perhaps leading to an alternate Predator 2? The OWLF doesn't really know where to look and City Hunter just had the run of the place perhaps meaning he survives and potentially never killing Peter Keyes. Or what if Harrigan doesn't quite kill City Hunter and they rematch years later this time with cybernetic upgrades (replacement hand) and Harrigan has to out-think him since it's not like he can get lucky fighting him twice and he's much older.