How about a backer-voted adventure PDF? So you guys put up a poll of the ideas you've been kicking around, and then backers vote on which one we want to see?
We've already committed to 7 over the next two years for backers, plus we have the rest of ZEITGEIST and MYTHS OF THE FAR FUTURE, and TO SLAY A DRAGON is imminent. Realistically, we can't produce anything more.
What I'm actually looking for when I refresh the Kickstarter page is new pledge levels, though. I would have jumped on the PirateCat D&DN G+ playtest, but it was already gone. I nearly committed to one of the "tell us what to do" options, but couldn't come up with a concept that would be great as a one-off. So I'll be pledging before the deadline (for Lifer if nothing else), but haven't yet.
I'm wracking my brains!