Is this collection of Galaxies where it ends?

I've been very recently fascinated with our Universe and had an interesting thought. Our galaxies are comprised billions of stars, planets, etc; The Universe (uming, sort of, that the universe is an unfathomably large closed system) is comprised of billions of galaxies, dark matter, etc. Do you think that there might be billions of different, "collections of Galaxies", maybe that occupy different laws and natural elements.