big bang theory???

I would say most modern cosmologists believe there are a vast number of events like our Universe with its Big Bang. Some suggest such events could even occur within our Universe. But we wouldn't necessarily notice! The Big Bang is not an explosion into anything: it is a a creation of space time which then grows (again, not into anything).

I have no idea what you mean by "the next BB": please elaborate what you imagine.

You are incorrect, because you surprisingly assume these other events are located in our observable Universe. They are not.

Seriously, there are no other Big Bangs in the observable Universe except the one which created it (which we see indirectly). I have no idea where you got the idea there were.

An entity needs to be in space-time to have a distance from us.

If you see a photon that has come from somewhere, that place is in the observable Universe. That's part of the definition (it's not all of the definition, because detection of other signals, such as gravitational ones, is also possible).

Has anyone heard of a former child prodigy named Jacob Barnett?? If not, you may want to look him up. He has an IQ ten points higher than Albert Einstein. He graduated high school at age eight years old. He entered high school at the age of ten. He was doing a PhD when he was fifteen. He could be the next Albert Einstein. Why am I bringing him up??

He was trying to disprove Einstein's Theory of Relativity and the Big Bang Theory or trying to improve on them. I forgot which one, but he believed that they both had flaws. The Big Bang Theory is the most widely accepted theory on how our multiverse was created, but it has some holes in it. We will just see what he thinks and says about the Big Bang Theory.

I have wondered if he played chess or not. Btw, he has Asperger's Syndrome.