In my opinion, you shouldn't Kickstart a project that is a sure seller. You should have the courage to do something that you want, not something that gets you the most income. For example, if they'd start a Kickstarter for Modern Warfare 4, they wouldn't get single penny from me.
Also, I think that the reason for Double Fine's success is that they are going back in time:
"This year, you'll be given a front-row seat as they revisit Tim's design roots and create a brand-new, downloadable "Point-and-Click" graphic adventure game for the modern age."
In my case, they are claiming to make a game similar to those I played when I was growing up. After LucasArts' adventure games, my childhood continued with Baldur's Gate. In 2012, there might be games that are a lot better and longer, but they will never replace the old ones in my heart.
I have no doubt that whatever game you make, it will be a good one and I will play it. If you get me that feeling of nostalgia: http://goo.gl/KJOhN
EDIT: On second thought, you are the pros. Do whatever you want.