New Brevoort Formspring

When there's an event like Secret Wars which has a long build-up and is seeded with hints, clues and various time travel storylines that may (or may not) lead into the story, are the creators all emailing each other scripts and ideas ("hey, I'm bringing Xavier into the future") outside of the summit or do they go through editorial with you and Axel giving Caesar-like thumbs up/down? Or is everything literally hammered out in the summit? Thanks!