The following is not a question: Can something come from nothing?

[pocaracas]

Again, keep in mind that "eternal existence" would require time and time is not a guaranteed to exist at this stage.
Also, multidimensional time may exist out of the known universe, which can bring about some weird stuff. I can't think about it, I cannot wrap my head around 2-D time, but, at this stage, it can't be dismissed. This sort of thing is what I mean by "the rules we know of" breaking down.
Virtually anything is possible.

As those go beyond (or outside or whatever) the laws of nature, they're appeals to supernatural explanations.

Supernatural, you say?
Well, I don't think I was providing an explanation... I was merely pointing out that we don't know how things work at what is known as a singularity, hence, no explanation is valid... as such, any can be valid which renders each of them useless, until we find out some more about the singularity (if that is at all possible).
Sure, we can speculate to our heart's content, but, in the end, mental masturbation is still just that... well, it can sell books, so there's that. If you're inclined to it, you may use any of my speculations to write your book(s) and make money off them.
One speculation has sold countless books and boasts of having been involved with the first book ever printed, so I sense big bucks in there!