another crazy theory i was thinking about:
supposing there IS a wedding between Liz and Will, Jack will show up and object... causing complications all around. there will be tons of liz/jack tension as he explains why liz should in fact be with him, but then suddenly Jack will pull a stunt, steal something, or have his crew attack the town, playing off his objections as a distraction so he could get some treasure or something....
then, Jack will be on the pearl and Tia will show up and be like, "I thought you were going to claim the girl you love?" And he'll be all Jacky, and say something like, "No, Liz was right about me. Unfortuntely I am a good man after all." and tia will say "so you left her with Will Turner?" and Jack will grin and say "For now..."
LOL guess what I just noticed...right before Liz chains Jack up..he is pretty much CONTINUOUSLY staring at Liz in that scene...Ragetti says "its alot of open water" he's staring at Liz intently and then tuens to look quickly at Ragetti and when Will says "we can get away as it takes down the pearl" he's not turning around quickly to face him like he did when Liz and ragetti spoke..he just continues to look RIGHT at her until everyone leaves.. 😂
I think he might be deciding to stay on the ship and give them(mainly Liz) a chance to escape anyway..
Also I'm REALLY convinced that whole Kraken scene at the end was one big symbolism for the sex Liz should have had with Jack(judging by the many convos they had which secretly mean sex)..but Disney couldn't because its a PG 13..They know that the adults(who make up the majority of the audience) will understand the symbolism whilst the kids will be thinking "wow look at that monster!"