#2: A disastrous match with Goldberg made The Undertaker realize that he may be forced to retire after all
We all know that The Undertaker and Goldberg were getting paid a lot to wrestle in Saudi Arabia. During the buildup to their disastrous match, you could figure out by the look on Undertaker's face that the chances of this going south were pretty huge.
That is exactly what happened at Super ShowDown 2019, where The Undertaker could have faced a serious life-threatening injury during the match. Goldberg dropped him on his head and also got concussed along the way. The Undertaker had to execute a weak chokeslam for the victory, and on the flight back home, you could see just how tired Mark Calaway became at this stage.
The documentary didn't place as much blame on Goldberg as the internet did, but Chapter 4 really focused on Undertaker coming to terms with the fact that his search for one great final match was unlikely at this point.
We often talk about fictional character growth on film or TV, but this was a moment where after almost 5-6 years, Mark Calaway grew as a person and accepted his own reality.