I say our section expands into the rest of the universe. My new idea is that the weak force might be the key to big bangs from black holes at cosmic mass limit #3. You see, the strong force works entirely inside of matter holding structure firm from the inside, and gravity works entirely outside of matter holding structure firm from the outside, but the weak force can work both inside and outside of matter, and is the only force known to eject matter from matter.
In regular atomic matter the weak force essentially splits in half and ejects electromagnetism outside of matter to work partially inside of matter on electron orbits and degeneracy pressure, and partially outside of matter on electromagnetic fields and the attractive/repellant forces of charged particles. In that state, as matter is added, gravity and nuclear/degeneracy forces are added as well, in nearly equal increments, but gravity is added slightly incrementally more, right up to collapse to black hole, when total gravity finally overtakes total nuclear/degeneracy forces. However, at that time, electromagnetism is pushed entirely inside of matter, the entirety of the weak force is 100% inside of matter, and the black hole has a neutral charge. In that state, as matter is added, nuclear/degeneracy forces and gravity are added in nearly identical increments as well, but nuclear/degeneracy forces are added slightly incrementally more than gravity, right up until cosmic mass limit #3, when total nuclear/degeneracy forces finally overtake gravity with a big bang.
In the very early universe, even under the expansion of the entirety of the universe theory, we know that the early universe particles were so hot and so full of kinetic energy that no attractive force could bind them, not even gravity, and we know expansion of space between the particles happened anyway, even though we might otherwise have expected everything to collapse into a black hole back then. So what happens when a black hole becomes as massive as the observable universe, and the particles inside are equally as hot and equally as full of kinetic energy as the early universe particles? Wouldn't we expect that not even gravity could bind them, just like it couldn't bind the early universe particles either?
Black holes are a constant battle between the repulsive forces of the primordial matter within and gravity pushing in, and it's a very close battle. At equilibrium day 1 before collapse to neutron star, we have roughly 1.4 solar masses gravity pushing in = 1.4 solar masses (net mass) nuclear/degeneracy forces pushing out. Add 1 gram that day and you get collapse to neutron star, because you then have roughly 1.4 solar masses plus one gram gravity pushing in but only 1.4 solar masses plus a fraction of a gram nuclear/degeneracy forces pushing out, a ratio of .9999999999999 or more to 1.
At that point, the weak force's work outside of matter consists mostly of massive magnetic forces, but there is some electric charge as well because some protons become trapped inside the core. A new countdown begins as matter is added, and gravity continues to be added at an incrementally higher rate than the nuclear/degeneracy inside of matter, until equilibrium day #2, when again, roughly 2.3 solar masses gravity pushing in = 2.3 solar masses nuclear/degeneracy forces pushing out. Add one gram that day, and collapse to black hole, whereby you have roughly 2.3 solar masses plus 1 gram gravity pushing in versus 2.3 solar masses plus a fraction of a gram nuclear/degeneracy forces pushing out, a ratio of roughly .9999999999999 to 1, nearly the same ratio but higher total force.
This proves that that nuclear/degeneracy forces, which are forever inseparable from matter, go right down into the neutron star and into the black hole, and it also proves that as matter was added, gravity was added incrementally more than nuclear/degeneracy forces right up to both collapses. But it's a very close battle and it doesn't take much to turn the tides the other way. And the pushing of the weak force entirely inside of matter provides the edge, and from the moment a black hole first forms, the new countdown begins, and nuclear/degeneracy forces are added incrementally more than gravity when matter is added, right up to cosmic mass limit #3, when gravity is overpowered and the big bang happens.