The pre-big-bang state

The accelerating expansion itself of the universe is a form of mass–energy (nowadays locally negligible), and in the future universe it will be enough to collapse it into a black-hole-core state. The inflaton field, which has to fragment (Planck degeneracy is the absolute threshold) and cause the standard big bang.

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You never explained why the accelerating expansion doesn't Big Rip. Make a video.
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We factually know that the universe acceleratingly expands.

The main doctrine in cosmology is that the accelerating expansion of the universe, will not shrink in the future the Hubble volume (causality sphere[s]) into a big banging big rip, because of cheap excuses.

According to mathematics, nowadays the Hubble volume expands (because it was smaller in the past) but if the accelerating expansion continues the Hubble volume will shrink again.

An immediate Big Rip is totally wrong because old universes aren't homogeneous and isotropic.

Thus the overall mass-energy during a period of accelerating expansion in the very old universe, will produce enough mass-energy for all the to collapse into black-hole-center matter (not a black hole, but the infinite universe will become only the black-hole-center matter = maximal degeneracy pressure of spacetime itself; which cannot be compressed more, and it will [verb] big bang in a typical big bang way.

The maximal degeneracy chromodynamic superfluid (most degenerate state possible) is probably a color charge fluid with imperfections on its surface. The imperfections are the other now separated properties of the quarks. It is mathematically impossible to only have color charge without the other properties of the quarks. In the physical black hole, the degenerate central torus CAN be a pure flow of colour charge, because it has a surface (all these way behind the event horizon) to host the rest properties of the even-numbered bosonic statistics megapolyquark.

The pre-big-bang state doesn't have an external spacetime. Thus it forms ginormous star-sized clumps of pure color charge, having a surface of the rest properties of the even-numbered megapolyquark and at a layer above that quantum tunneling reabsorption mechanism due to the extreme curvature of spacetime.

As degenerate pressure builds up in the pre-big-bang state, the colorcharge-superfluid becomes evenly fragmented in tiny grains, topped with two layers: the rest properties of the quarks and the quantum tunneling reabsorption mechanism (because the maximal degeneracy superfluid wants to explode = quantum-tunnel out, but the spatiotemporal curvature is maximal and there is no external spacetime).

The inflaton field is created when the maximal degeneracy chromodynamic superfluid becomes Planck-sized individual particles with their two layers. It cannot get compressed more and it adiabatically transitions into the standard big bang.

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Some other thinkers disagree, and claim that a very old acceleratingly expanding universe, will overcome a Higgs field threshold of stability, and the overall universe will get defaulted faster than a typical big-rip-degeneracy-big-bang.

You only think you mentioned everything.

Reject my ideas.

You never answered why the accelerating expansion of the universe, will not (not now; in the afar future) shrink all Hubble volumes, and the accelerating spatiotemporal expansion per volume will produce enough mass-energy to collapse into black-hole-core chromodynamic superfluid which will explode when the final limit of degeneracy fragments it into inflatons = inflaton particles which will start the standard big bang.