A novel idea about a novel idea

I'm lucky.  I have a lot of ideas for books.  Lots and lots and lots.  I just need more time to write them all.  As I attempt to wrap up my third book over this upcoming vacation, these ideas have begun to crowd my brain, each one vying for the top spot. 

Invariably, I will choose two or three ideas and combine them in some way to create a more compelling story, but I for long time., I thought was pretty set on what my next book would be.  It's an idea that I like a lot, and my wife and...