Question now is how much the emotional impact will be involved into this. Will Kaido be willing to kill her daughter ?
I think the battle will be like Doflamingo vs Law, perhaps more intense and with some differences. I imagine Kaido will try to make Yamato submit to him perhaps he will try to defeat her without killing her.
I don't know how much Kaido cares for Yamato, but he still views himself as her father and wants to be regarded as such.
I'm kind of expecting the fight to end with Yamato being defeated and Luffy saving her from a finishing blow (again like Law).
At the very least we should get some Kaido - Yamato flashback which could be interesting, maybe the time Luffy comes back
Yeah, I expect the battle to continue until Luffy returns. I don't think Luffy will fight Kaido again on Onigashima, and I wouldn't be surprised if Yamato and Kaido's battle leaves the island (I kind of expect them to fight in their Zoan forms and Kaido's Zoan form isn't appropriate for use within the castle).
It's in reference to her battle with Ace, when Ace wondered why she lets Kaido chain her heart too
Yeah, this is a nice catch. If it's indeed the chains on her heart she's referring to, it adds an extra dimension to their battle now.
I had initially thought that Yamato had broken that chain on her heart when she destroyed the dragon statue that represented Kaido's power:
The chains that were being broken in this chapter referencing Kaido's dominance and control over her life.
There is also this:
Small information about korean spoiler
Korean Leaker write about chapter title: 제목 "쇠사슬(인연)"
"인연" this word means is "Meant to be" so It has a connection with "Destiny"(some source adding destiny) and chapter title mention about yamato. There are also references in previous chapters on destiny.
https://en.bab.la/dictionary/korean-english/인연
I'll be waiting on the scanlations (and to see their subsequent interactions in future chapters) to see if it sheds more light on it.