Pure science fiction.
The universe is out of control, in a runaway acceleration. Eventually all intelligent life will face the final doom—the big freeze.Pure science fiction.
Which part? It's well-established now that the expansion of the universe is in an acceleration phase. If the acceleration increase over time, the eventual fate of the universe does indeed appear to be a big freeze, and maybe even what's been called a 'big rip', in which all matter is ripped apart the expansion force.