Plus, Infinity War goes out of its way to mention that the Infinity Stones were created during the Big Bang.
There are major SPOILERS for Avengers: Infinity War below, so read ahead at your own risk.
At the very least, this is the most creative out of the fan theories currently floating around the internet about the end of Infinity War and setting up Avengers 4.
Thanos is able to obtain all of the Infinity Stones by the end of Infinity War and snaps his fingers as Thor impales him with the Stormbreaker axe.