I always thought "your" theory was "the" theory. That these worlds already did exist, and weren't isntantly created, but were just.. there.
I've always liked this theory though, because it supports the existance of multiple universes where in the correct variables for the creation of life exist in some (but not all the universes), and we are in one of these universes that support life thinking "I wonder if there's anymore universes out there."
But then I remembered I can never decide whether I support the Single, Cyclic Universe theory, or the Multiple Universe one.. Damn you long nights of spacing out and wondering about these things.