When the Angry Video Game Nerd criticizes Rocky Balboa, he jokes that Rambo 4 would be called John Rambo. Rambo (2008) was, at one point during its development, going to be titled John Rambo.
There was originally going to be a part in the video where the Nerd addresses Contra and its sequels, but becomes confused over Contra Force and Contra III and complains about why the former was cast aside and not considered the official third entry. James Rolfe later deleted the scene because of insufficient research.