This is how he first learned it was one of six powerful artifacts. During a conflict with Thanos, Adam is drawn into the Soul Gem's Soulworld, where he lives a peaceful life with Pip, Gamora ...

It's a reference to a common fan theory that everyone who died at the end of "Infinity War" actually now resides in Thanos' Soul Gem. While the July 9th date for the "Snappening" was set two weeks ...