I am unfamiliar with any evidence that the Big Bang is unraveling. There is definite evidence that the universe is expanding and has been for a long time. But if you believe in the Big Bang, and I do, you still need an ultimate cause. You need a Big Banger. If nothing existed, someone or something outside of the universe had to cause the Bang in the first place. It is the principle of causality
>>I am unfamiliar with any evidence that the Big Bang is unraveling.<<
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Here’s a sample:
https://www.technologyreview.com/s/419984/big-bang-abandoned-in-new-model-of-the-universe/