We start with a large star that goes supernova. The remnant collapses into a black hole which creates a large separation in the timeline, i.e. inside the black hole time has almost stopped. Over the eons matter from the outside universe pours into the black hole where it is separated from our timeline and added to the quark-gluon plasma in the core of the black hole. Eventually the outside universe grows old, cools down -- there is nothing left but a multitude of black holes, frozen matter, and stray photons. This is when it gets interesting, because there is no ordinary matter left for the black holes to gobble up! The universe outside has aged trillions of years and undergone heat death, meanwhile the timeline inside the black hole is nearly stopped -- mere billionths of a second have elapsed since the original supernova that formed it.

The black hole starts to absorb exotic forms of cryogenic matter and heat, which are injected into it's interior as empty space, rather than adding to the plasma. The black hole starts to expand. The plasma inside decreases in density until a critical threshold is reached -- in a flash it becomes transparent. The burst of radiation will become the cosmic background radiation and billions of years later when the plasma accretes into galaxies and stars, life emerges. And the whole thing starts again.