Creationists don't have theories. At best, they have untested ideas, which evaporate when tested. That or they're defined to be untestable at all.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'