I'd like to see something which explores the post-adventure celebrity. You've come back as a group from some grand adventure which has made you fame but not fortune. Now you're having to adjust to this famed lifestyle as a group.

Being summoned by nobility to lend your new found popularity and imagined coin.

Getting mobbed by people wherever you go.

Trying to continue making a living as adventurers when everyone recognises you and gets in the way.

Could be interesting

I'd love to see another pirate/sailing adventure. PF1e had skulls and shackles, but 2e is currently missing something to fulfill the same fantasy.

That being said, the ship should stay relevant until the end, not be thrown away like the circus in extinction curse.

I wouldn't mind seeing Shattered Star or Mummy's Mask updated for PF2E/Lost Omens. They were fun when I played them years ago.