As long as I am just dreaming....
I'd love to get my designer hooks in A Series of Unfortunate Events. Yes, I know there's a game already and I admit I haven't played it but it was based on that mediocre movie. It'd be hard to find a license that was more perfect for adventure gaming.
There is also this little comic I picked up at WonderCon called Owly that I think would make a really fun game.
Everyday I think of something else that would be a fantastic game. And, of course, I'd like to be able to make them all. Sadly, Kevin and Dan won't let me.