It’s been 44 years since the release of the original Rocky, so clearly now is the perfect time for a brand new documentary called 40 Years of Rocky: The Birth of a Classic. The upcoming film, which is also being released outside of North America under the title Becoming Rocky, is directed by Derek Wayne Johnson, who also did the documentary John G. Avildsen: King of the Underdogs and has another upcoming doc about Frank Stallone in the works as well. The entire thing is narrated by Sylvester Stallone himself but it’s hard to tell from this trailer just what to expect. The IMDb listing says it is only 30 minutes long but here’s hoping this is something more than just a glorified Blu-ray special feature. 40 Years of Rocky: The Birth of a Classic arrives on VOD on June 9th; check out the trailer after the jump and let us know what you think.