I don't think Jack gets defeated until Luffy meets him at least. There was still the plot of Luffy wanting to beat Jack's ass for destroying Zou.
Imo it's clear now that Jack didn't even use his hybrid mode in Zou. He wasn't nearly as much pushed as now against the sulong minks. It's going to change at that moment when they totally overwhelm Zoan Jack in which Jack will use his hybrid mode instead... or even his awakening if he awakened his DF.
yea jack can use hybrid but two sulong dukes is too much for him.
but luffy doesnt get hometown ruined, his people slaughtered and his organ chopped.
the dukes has every right to deliver redemption.
even luffy himself will understand that
the fight between Duke and Jake was almost equal with Duke cannot beat Jack and vice versa.
okay jack doesn't use his hybrid but Duke doesn't use sulong either.
now Duke in sulong as power up. jack can use hybrid as his power up like sulong. but it will make them tie again just like zou when Duke wasn't in sulong and Jack wasn't in hybrid. but unlike at zou, right now 2 Duke working together in sulong form, so don't expect to much from hybrid jack.
even at fifth day jack barely wounded at zou. this time it's just less than hour but jack already wonded.
Jack is tough mofo and total beast. too bad he is facing two other beast with power up.