@Riot So,is pyke crazy or just used by some force ?
Hello,even with all the lore,both audio,video and written,all we knows it that Pyke was indeed not revived by the black mist or Nagakabouros,but we still got no solid indication to what it really is.
My most probable theory is that he was actually revived by the same jaullfish species that he "was haunting" altrhough it is also hinted that he never really used to hunt on The Terror,so another shade is added into this already shady backstory,this was most probably intended from Riot but even if i was strongly hating this character from a gameplay perspective at reveal and launch,his lore keeps me guessing,and his actually quite well written.
We also knows that his list keeps getting names on it,even after seemingly killing all the crew of The Terror,has seen in the "THEN,TEETH" story about this captain,Beke Nidd,who crossed the path of Pyke and his list.
From this we can assume that either The Terror actually existed,that his mind is deeply broken and created all this story so that he could be a "vengeful wrath" with an actual reason to do so or Pyke is just being fooled by the same force that gave him powers and his immortality/New un-life.
He also seems to strongly believe that the "Swimming City" actually exist,wich is suuuper cool from my point of view,a city in the depths where otherworldy beings live,such as ghosts of the drowned ones,wich is why they named the Bilgewater event this way in my mind even if Diana and Vlad are actually just skins of another plane of the same lore (See skins lore)
What really pains me is that we don't know exactly if Pyke is just crazy about the fact his crew actually existed and betrayed him,hence the powers the entities gave him,or his he just broken deep inside(wich makes sense,he's dead,he drowned and he was physically and probably mentally pressed by the pression of the depth),and i'd love to know a bit more about the "swimming city" aswell,this is too much of a gold mine not to dive deeper into it's lore,if there is one !
Is there any tidbit of lore,informations,conceptual developement things you could share with me ?
Thanks for reading ! 
Edit: I'm also failry sure the swimming city actually exist,and it is there that Pyke actually came back to life with powers,so this is probably linked to something,but i'd like to know if this is to the jaullfishes,or anything else really. I mean,alot of pyke's quotes are pointed toward the inhabitants of the swimming city,he also quotes that the same fishes he was told to kill would tell him to kill captains back,that leviathans can learn,that he have seen what lurks below: "lots of eyes".. So yeah,the swimming city is most probably the city of levianthans with immense powers,and also drowned people i would guess.