In my RtR game, the PC's will be finishing Nkechi quests this week and returning to Elder. They have 2 in game days before the expedition begins. I decided to reach into each characters back stories for some side madness. The faction they chose is the Red Mantis. They would love to get revenge for freeman's warehouse attacks, and they think the Shackles Pirate faction is behind it. They're right.
In Corky's backstory, his rival is a Pirate Captain named Black Sam. As they return to Elder, they'll catch sight of Black Sam's ship parked next to the Shackles Faction's ship. Corky the Drool will want revenge for his permanent drool. So I'm going to have them goto Nkechi's favorite pub. Where Gelik will be performing his ballad about "Gelik: the hero of smuggler's Shiv, and the PCs' half orc barbarian is a big oaf, with his semi useful companions, who'd be nothing with out the great Gelik." Kyras, the ex-indentured spy/ninja, is going to be confronted by an agent of his past and will not want his whereabouts revealed.
As they leave the pub it should begin with chase scene of a spy/ninja type person leading to the Aspis warehouse. As the chase begins, Aries and her all female pirates ambushing PC's for romantic revenge. Possibly kidnapping the PC and taking him to Black Sam's ship. If not, then there faction leader (Red Mantis) will order them to take out Black Sam's ship because it's filled with supplies that will empower the Shackles Faction's expedition. This fight will go simultaneously with the chase scene.