Underwater Exploration

Around the time of the Pirate Era many ships had diving bells equipped to them and a couple friends and I began theorizing about this. There could be a new faction about it, however it's not necessary, but there could be some sort of indicator in the ocean about an area to dive down into. Only 1-2 players would dive down at a time as it would teleport them to a different, secluded area of the map where they'd be deep down swimming next to a recently sunk ship. The only light coming from above them and only shining down onto the ship, the rest around them is pitch darkness. These could behave like normal wrecks where there's treasure inside and you'd simply bring it to the diving ball in a special area inside, for it to be brought back up with you when you return to the surface. A ship currently diving under cannot move or be attacked my a Megalodon, Kraken, or Skelelton Ship so the ship isn't sailing already when the players teleport back in the diving bell and they have no risk of being harmed by AI whilst their crew is diving. If it was a new faction then the voyages would get progressively more difficult to this point or it could be random if this happens out in the ocean but there could be a creature guarding the recently sunk ship. Let's say a Megalodon would circle the wreck over and over like it's guarding it's recent kill, being seen by the Megalodon will result in death and trying to leave he wreck area into the darkness will have you be killed regardless of what's in the area. There could be a Skeleton Ship around the sunken ship since we've seen they survive underwater since they come out of the water to attack you. Most of all there could be a Kraken, sleeping by the ship, with most of it's body obscured in the darkness so you only see it's tentacles, they could be wrapped around the ship, slowly moving up and down, potentially doing that around doorways so you have to time it right as to not accidentally bump into it and awake it. There could be a new chest, that's extremely difficult to get, within one of the Kraken's tentacle's graps, timing it right will net you the chest, time and wrong and you and your crewmates who're under water with you will be long gone.