There were all sorts of interesting theories, one theory purported that the Big Daddies are actually clones of Rick Moranis from Spaceballs, another stated that the Big Daddies are actually Big Sisters, and that all Little Sisters grow up to become Big Sisters. While there were a lot of interesting theories on exactly what is behind the mask one in particular really stood out above the rest.
"The things in the Big Daddy suits have completed the change, or are a probably a race that were found at the bottom of the sea (who's caverns we'll eventually have to trawl towards the last parts of the game) and who might have been spliced together with humans. The suits it seems to me are there to keep water in (so that they can breath with their gills) rather than to keep water out (and they do seem to leak when they're damaged)."

The fourth game in the ‘BioShock’ series has been in development for more than a decade
Bioshock is one of my favourites franchises. I love all 3 games and have played each several times. I even have a room in my house that is loosely decorated around the theme of Bioshock (with a Lighthouse, coral models and postcards styled as though they are from both Rapture and Columbus).
And yet I am going to find it extremely difficult to get even remotely excited about any future episode in the series after all the problems this has had in its development cycle.
Leave the franchise alone. Remaster them again if you have to. Then put whatever talent you have to use on something brand new.
It sucks this game is in development hell because I love BioShock and would love a 4th game. I hope it turns out great, but I guess we'll see.
It's been in development hell since 2014. This is nothing new. It saddens me because it's one of my favorite series. At this point, Judas may end up releasing first.
Bioshock 4 (if it ever comes out) will probably still look and play like a Bioshock game, but without Kevin, it might miss that spark that made the originals so special. Honestly, Judas might end up feeling more like the real spiritual successor.

Learn where you can get BioShock Remastered for free and enjoy playing it on your devices, including the Steam Deck.

Console Creatures writes, "The BioShock film at Netflix is still happening but with a reduced budget."
It's 10 years too late for a BioShock film. The world of Rapture would have been perfect for a film. It's actually a good candidate for proper utilization of 3D, for increased depth rather than bullshit popping out of the screen. It could really show off the underwater city that way. But BioShock as a brand is so irrelevant these days that a film just doesn't make sense. Especially considering it would need a big budget and top notch effects to really take advantage of the IP.
Netflix greenlights anything, so that shows me very little faith in the project. Enough to just crap something out as they're, more and more, known to do.
I'll laugh if it turns out to be better then the Borderlands movie
This was originally brought up in the forums because i didn't think it should be a story but others thought differently so i posted it.
It seems the theory that is discussed...water tight. Perhaps with how well sealed this theory is it may be able to hold water for the final product.