I changed... a lot since the first meeting.
Originally, I was only going to feature the Sirens to slowly drain SAN and push the Agents toward The Mother, but I asked an important question: "How can I make my Agents worse?"
The answers I came up with are a little extreme. One is to introduce an inclination toward unnatural drugs for the Agents, risking their jobs and relationships due to increasingly worse POWx5 rolls as they become addicted. This ranges from legal stuff (Fuco Loco, a local alcohol distillery, a coffee featured in a scenario, etc.) to the real stuff (Coco Loco, Reverb, etc.).
The second is more involved, introducing the Brotherhood of New Potential as a group that the Agents can pursue on the side. We got one Agent in our campaign looking into them at the behest of their Siren, and I'm wanting the table to roleplay the other members, encouraging their straight-shooter FBI agent ally to go deeper. And yes, Potential Recruit was the inspiration; I'm in love with the BNP's potential here!
I'm not sure how to best execute this strategy, nor how to prevent the session from becoming a 4-hour game of playing house, but I'm excited nonetheless! The goal is to have a mix of Brotherhood inductees and former federal agents brought low by addiction by the end of the campaign.