Rocky Easter Egg - Balboa Must Have Stolen That from Stallone

Here's a tough one that I'll be willing to bet most serious Rocky fans are not aware of:

In 1977, Sylvester Stallone wrote "The Official Rocky Scrapbook" about how the movie came into being, including some interesting stories about how the film was made. The cover (of some editions of the book) has a close-up of Stallone wearing a black beenie hat. The cover says "The Official Rocky Scrapbook, by Sylvester Stallone."

In the beginning of Rocky III (1982) during the opening theme song, some images of magazines with Rocky on the cover appear on the screen. One of the images is the cover of the Official Rocky Scrapbook. But Sylvester Stallone removed his name from the cover and replaced it with "by Rocky Balboa." It's another very subtle referece to some of the parallels between the lives of Rocky and Sylvester Stallone.