Here is a theory for blackholes that offers a unique spin. If the universe formed from the BB, where the entire mass/energy density of the universe begins as a singularity, could blackholes form directly from this high density of the primordial atom? The singularity already has black hole like parameters? This would make many black holes, especially the big ones, dense remnants, from the beginning of the universe.

There is an advantage to the black holes forming early. If we compare a BB singularity that expands and atomizes into sub particle matter and energy, to one where the primordial atom of the BB, quantum divides into two daughter black hole phenomena, the former defines much higher entropy, while the latter defines much lower entropy.

For entropy to increase, it need to absorb energy; heat. This means the former; the atomization scenario, will loose energy faster into its extreme entropy increase. It also means atomization needs much more energy, up front, to occur. The latter; quantum division, defines less entropy and therefore looses energy slower. It also means, it needs less energy, up front, to move the primordial atom to a first step.

The question becomes, is it easier to explain the extreme energy, up front, needed for the extreme entropy connected to the primordial atom's atomization into sub particles? Or is it easier to explain many orders of magnitude less energy, up front, needed for a quantum division. Less energy needs offers more options. Like in living cell cycles, separation into two daughter cells is energy friendly compared to atomizing the mother cell. A quantum division model for the BB, makes two daughter cell black hole caliber density singularities, separate, with both cells still at nearly primordial atom space-time contraction; minimal energy needs. I like this because we live in a quantum universe.

Say you compare two identical factories, side by side, where both make widgets and each makes one defective widget per hour. This is a measure of entropy. If one factory was placed in a highly time contracted reference, and the other factory was in a highly time expended reference, the rates of entropy would appear different, if we compare these, side-by-side, from our earth reference.

The expansion of the universe, due to space-time expansion, increases the rate of entropy, based on any standard reference. This entropy driven increase, due to space-time expansion, will help drive quantum division, in an exponential way, until galaxy level quantum appears. The expansion of the universe, relative to the galaxies, implies a different phase change; mini-big-bangs from blackholes centers.

This quantum scenario does not require all the expansion energy up front, like the current model. If we assume dark energy is needed for the expansion, we need less dark energy at the beginning, with the dark energy source building up as a function of space-time expansion, providing energy for the entropy of further division.