The 'trailer' posted is a fan made video. There is no Rocky 7 movie coming out.
George Foreman was 45 when he won the world title. He defended it several times up to the age of 48, then lost it to 26 year old Shannon Briggs via controversial decision. (most observers thought he won easily, and Briggs almost knocked out Lennox Lewis in his next fight).
Jack Dempsey knocked out two black would be muggers in New York when he was in his 80s.
Thanks for noting they were black.
Very important to the story
They very likely were doping would be black muggers in the world according to Coevett.