The Character Died With Her: Colleen Dewhurst, who played Marilla in the 1985 TV movie version, died during the production of the spinoff TV series Road to Avonlea. Marilla was then killed off in the series too.
Franchise Zombie: Could be said to apply to Montgomery, who continued to write novels and stories set in Anne Shirley's universe up to the day she died. It definitely applies to the Kevin Sullivan TV franchise, which to date has included four made-for-TV movies-cum-miniseries, an animated TV show, an animated film, and a long-running TV series set in Avonlea.
Orphaned Reference: Some productions of the musical, particularly high school productions, will replace "The Words" with a different song ("When I Say My Say," meant to give more time for a wig swap for the green-hair scene) but will leave its reprise intact.
The 1934 film:
Name's the Same: Invoked. Actress Dawn O'Day changed her name to Anne Shirley after playing the character.
Mitzi Green was cast as Anne but was later dropped when her Stage Mom demanded more money.
Katharine Hepburn longed to play Anne and was always disappointed that she never got to. Her grand niece Schuyler Grant got to play Diana in the 1985 version.
The 1979 anime:
Keep Circulating the Tapes: While the original Japanese version is extremely easy to find, the South African produced English dub was lost to the public for years (in fact, the videos on YouTube of said dub are region-locked if you live in the US and Canada). Fortunately, they are available on some upload sites.
What Could Have Been: Katharine Hepburn was offered the role of Marilla, but she turned it down. As mentioned above, she wanted the part of Anne for the 1934 film, but the part was given to someone else. After turning down the role of Marilla, she suggested her grand niece Schuyler Grant for Anne, but Kevin Sullivan gave her the role of Diana instead since he wanted a Canadian actress for Anne.