With all due respect to Bioshock 2 and Infinite, I feel like Bioshock would have been the best as one of those standalone cult games that you remember for being original and interesting. (Alan Wake comes to mind). It just has that forgotten cult classic vibe despite being very popular at the time, and I think more sequels will only boringly bloat out a world that wasn't improved upon by either of its sequels. If there has to be another one, I would really prefer that it be a standalone "inspired by" Bioshock and not pointless nods "for the fans" and unnecessary worldbuilding. (I'm really burnt out on "worldbuilding," thanks Marvel and Brandon Sanderson fans).
(full disclosure, I love Brandon Sanderson, but if I see one more post on the internet about how he's a "genius at worldbuilding" I swear to god...)