The idea that black hole formation might also be universe formation is quite old; I don't know what the new contribution of Poplowski's work is. (For the avoidance of doubt, I simply mean "I don't know" and not, e.g., "I suspect there is none".)

Lee Smolin made an ingenious observation: if that's so, and if it happens that in the "daughter" universe the constants of nature are slightly (and variably) different from those in the "parent", then we have exactly the setup required for Darwinian evolution, and we should expect universes to be selected for black hole fecundity. (And if that's correlated with, e.g., the viability of stars, then perhaps it explains "fine tuning", in so far as that actually exists.) Smolin wrote a book about this, called "The life of the cosmos", but I haven't read it so can't recommend or disrecommend it.