If there are an infinite number of Universe then everything that will happen has already happened.

The existence of the other worlds makes it possible to remove randomness and action at a distance from quantum theory and thus from all physics.

 Many-worlds implies that all possible alternate histories and futures are real, each representing an actual "world" (or "universe"). In layman's terms,

 the hypothesis states there is a very large—perhaps infinite^[—number of universes, and everything that could possibly have happened in our past, but did not, has occurred in the past of some other universe or universes