Hey Kris,
You can start thinking about topics now, but the agenda itself will be set on Day 1 of the conference. Attendees volunteer to lead sessions on topics of their choosing. After the initial schedule has been set, attendees sign up for session topics that interest them and can even negotiate to combine or move sessions.
The question to answer is, "Where do we lead the APIs of tomorrow?"
I suspect many topics will revolve around the state of the art today, the future survivability of these approaches, and how we as community members can move the ball forward in a constructive and positive way.
The topics in this API Craft Google Group might provide a sample of what to expect, but I would bet on a lot more being discussed. It's amazing how in-person collaboration can change course of meaningful conversation. Personally, I'm excited to see the outcome!
If you already have a lot of great ideas, wonderful! Let's get them on the board on Day 1 and make sure they get discussed. Otherwise, feel free to hop in anywhere that feels right to you once the conference gets moving. Always remember the Law of Two Feet: If you're not getting value out of a session, move on to a different one. Maybe start your own conversation with another group of people.
This conference is designed to provide a meaningful experience to its attendees. If you care about APIs, you're bound to get involved in discussions for which you're passionate.
Can't wait to see ya there!