This is not even an hypothesis at this stage. Just a notion.
The “singularity,” located within a black hole, is a point wherein matter is crushed to infinite density, and the pull of gravity is infinitely strong. At the singularity, the space-time curvature is infinitely large. Could it then follow that there is no distinction between location in time or space relative only to the singularity at that point? Hence, taken from the frame within the singularity inside any black hole in the universe, all singularities are the same singularity. I think this notion could be worked out symbolically and mathematically without physical proof through impossible observation.