How did Quynh escape from the bottom of the sea?

Sea water erosion chain?

Bottom feeder fishing ship picked her up and she merc'ed everyone onboard, made it look like an accident. Booker I'd lucky he has an attractive and insane Asian chick to mess around with for 100 yrs.

My impression was that with Andys' faith being restored, the team started searching for her again and found her within the six month period that the last scene took place. Then, not being totally heartless due to the types of people that they were to have become chosen to be immortal in the first place, possibly asked her to keep the banished guy company until he'd served his 100 year "sentence".

I guess a giant octopus squeezes it's tentacles into the iron vessel and strangles her into pieces before eating her.

This element of the story really annoyed me. I kept on waiting for them to go and hunt for her.

Then the bad guy say something like "I can get at least one". I figured he was talking about her. All that research deep into the past and he never did any digging on a "witch" thrown into an iron maiden and kept underwater.

If I was in charge of those witch trials. I wouldn't throw her into the sea. I'd keep her somewhere close and guarded. Like a well at some holy site. Church basement etc so they can pass on her guarding throughout the generations. Throw her into the sea and they risk her escaping/being found by fishermen etc.

I haven’t read the comics, but I was thinking the drowning/death loop for hundreds of years would make her insane. Maybe she’s dragged up by some fishermen or marine biologists and she becomes the villain in the next movie.

Apparently, this movie -- and this plot development -- is based on some graphic novel that I've never heard of, but it's a reveal that I think weakened the movie.

Overall I really enjoyed this movie. Like Highlander, it touches on the theme that immortality for a few can be just as much a curse as a blessing when you have to watch the ones you love age and die. Booker's monologue about having to endure the deaths of his sons, including the hate from his youngest son who envies his father's immortality was probably the most moving scene in the movie for me.

However, the fate of Quynh was nightmare inducing. Imagine having to live at the bottom of the sea for all eternity ... cold, alone, immobile, in near silence... and knowing that it will never end, that you could never even kill yourself to escape it? After five hundred years(?), I thought she would be horribly and truly insane in a way nobody could imagine.

It was a pretty original take on the curse of immortality, but it's undone when we see her suddenly show up looking fine like the resurrected villain from a Bond movie. It took a lot of the punch out of that previous scene where she was dumped overboard in the iron maiden.

I have a feeling she'll be the new villain in the next movie. She'll want to seek revenge against Andy for not saving her in the ocean.