I think if the Multiverse exists that our Universe will be much like the
poistion of ourselves and our galaxy in relation to the Universe: Not at
the physical or heirachical center but no less insignificant that many
other such realities.

As for your ideas, you gotta read more science fiction, then you will
realize just how unbizarre these thoughts are in comparison to what has
already been said and thought about existence.

As just one example, I always liked Carl Sagan's view that humanity is
a way for the galaxy to know itself. In essence, we are one collective
mind of a much larger entity. Perhaps just as really big dinosaurs needed
more than one cluster of nerves to maintain their whole long bodies, our
vast Milky Way needs more than one "mind" (other intelligences) to get
and maintain the whole picture.

It's just a thought and it will take a long time if ever to prove or disprove,
but it is definitely cool and fun!