It is pretty much accepted now that space is not independent of matter, but is created when matter is created.

It appears that space is created, then, by energy in motion (kinetic energy). If that is true, then electromagnetic waves are simply an indication of space being created. Of course, then, the effect damps down quickly because the new space is relatively trivial in comparison to the background space already there. The effect is quite comparable to water waves from a passing speedboat.

The mechanics of, say, a high-powered lasar beam must somehow involve interaction between virtual paired photons, one in this universe, and one in a hidden dimension that is not subject to space or time. This would fit with Bell's Theorem. So, the speed of light can be explained by saying that light creates its own space and should, thus, travel infinitely fast in that hidden dimension. The interaction between those virtual photons must somehow be the cause of light slowing down from infinite speed to that which we know.

Therefore, the speed of light is a clue which should be investigated more thoroughly, because it hints of some new parameter or curvature or whatever that might someday allow better insight into "what came before".

Following along this line of reasoning, it would seem that two black holes are completely independent of each other, and do not "connect" in some other universe. That is, what is observed about the gravitational effects of black holes is only a relationship between this universe and ... and ... nothing at all!

Pursuing this still further, we see that completely separate universes could pop up anywhere, with no connection among them, ever.

So, try this thought problem for size: Go out into completely empty space somewhere and focus a large number of high powered lasers so that they meet at a point, with the emphasis being that their combined efforts cannot allow anything to escape from that point.

What would happen?