Is there a known relationship between the multiverse ideas and the power asymmetry?

There could exist such a relationship but no such relationship is known at this moment. The very existence of a multiverse doesn't imply that the power spectrum should be symmetric or asymmetric and the asymmetry doesn't imply that the multiverse should or should not exist. If the asymmetry is caused by "new physics", this new physics must clearly be considered simultaneously with inflation (or any other picture that you choose to replace inflation) because the asymmetry is a feature of the very same dataset.

The comments that the asymmetry would tell us something about the Universe "before the inflationary era" or even "before the Big Bang" are completely unsubstantiated. Once again, these reports are cheap, pseudoscientific, pornographic material addressed primarily to readers with IQ below 20. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.