Group kickstarter campaign?

Hey all, I had the idea of starting a group kickstarter campaign kind of a cross between kickstarter and a humble bundle.

The idea is by pooling together to start one campaign then the uniqueness and combined marketing effort would help get that campaign funded with the funding being split based on rewards. That's where the humble bundle element comes in: When choosing a reward tier backers could opt for a game of their choice at tier 1, two games at tier 2 with a minor discount and all the games at a more significant discount at a higher tier.

There are obviously pros and cons to this sort of thing, for example it's hard to determine what you can promise backers when you don't know how many people are buying into your specific game.

Either way, let me know your thoughts, thanks.