C
Charlemagne_III
Guest
And I suspect all of those you cite are self professed atheists or agnostics. Do you happen to know?Here is a paper where it is argued that, under certain assumptions, the universe will collapse in 36500 billion years or less (Big Crunch).
arxiv.org/pdf/astro-ph/0409264v2.pdf
According to wikipedia, supporters of one of the multiverse hypotheses include Stephen Hawking, Steven Weinberg, Brian Greene, Max Tegmark, Alan Guth, Andrei Linde, Michio Kaku, David Deutsch, Leonard Susskind, Raj Pathria, Sean Carroll, and Alex Vilenkin.
As you point out, a hypothesis it is … this Big Crunch … not even a theory. A desperate ploy by atheists in the physics department.

There is no scientific evidence that the universe will draw back into the Cosmic Egg.