What we know about cosmology precludes any Multiverse. We know that the universe had a beginning as a singularity and is now expanding at an accelerating rate. This means its future is infinite. And if there is no future collapse then there can be no prior collapse and thus no previous universe. As far as the multiverse is concerned it doesn't exist in the same dimensions as this universe. In other words the universe is potentially infinite in size by its infinite future. So where is it going to fit in a multiverse of our 3 dimensions? No. The universe has no spatial outside and therefore is not in something bigger. Religious people have no problem with this; with creation out of nothing; but without God the atheists have to put the universe into something bigger.