Your question poses another question, was there nothing before the big bang?
Depends I guess. What exactly is nothing? Maybe our universe was created from the bang of two universes colliding, or we are the white hole of material ejected from a black hole. It is an odd coincidence that our universe began at a singularity and a black hole ends at a singularity.
The one thing that is a constant in this universe is that everything comes in multiple versions, plants, animals, planets, stars, galaxies... not unrealistic to think of multiple dimensions and universes.