Taken from an interview with Walt Disney on Disneyland's Opening Day, July 17th 1955
Interviewer: ...and Mr Disney the kids here are equally excited for your next feature as they are for Disneyland.
Walt Disney: Yes indeed they are. In fact the boys over at the studio are working hard on our next feature, which will release this year so I do hope everyone is as excited was we are over at Walt Disney Studios.
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Taken from "Lion Around: How Disney's Lion King Came to Be", produced 1994
Narrator: Walt Disney had wanted to craft an animal-centric film for a very long time. Ultimately after 15 years of work, the idea finally became reality as "The Lion King".
Joe Grant: During the earliest development stages of "The Lion King", Walt wanted to make "Bambi" and even "Bongo", which was a little story about a circus bear living in the wild. The storymen and I essentially took that concept and crafted an entirely new story based around another species of animals. We were thinking of dogs, cats, bears, a lot of other animals before we settled on lions for the final cut.
Frank Thomas: We wanted to make the animation look as smooth and realistic as possible. Therefore Walt brought in all sorts of animals for reference, except for the lions, we had to go to a zoo for that one.
Ollie Johnston: Even though we did make "Bongo" in the 60s and 70s,we took a lot of inspiration from that and "Bambi" for the main storyline. We made a few drafts for the original dog version back in the 1940s, but ultimately the storymen and Walt felt that the draft lacked charm and was overall boring. That and World War 2 was why we shelved the project until after we did "The Nightmare Before Christmas", when Walt revisited the idea with lions.
Frank Thomas: In the first 1950s draft, Simba initially had parents who raised him in the zoo. There was this one scene where Mufasa causes a stir in the zoo and was shot, which ultimately causes Simba to run away in the first place. We had to cut that scene and Simba's parents in general, as it affected the plot tonally and dragged the film on.
Ward Kimball: I was wondering who would get the juicy job of animating Scar, and then I heard that Walt wanted me to do it. Since I specialised in animating the wackier stuff, animating a semi-realistic lion was pretty challenging.
Leonard Maltin: "The Lion King" is a gorgeous film with amazing animation and story. It's just an entertaining timeless classic that every Disney fan and animation fan in general should watch.
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Walt had experimented with animals in animation for a very long time, considering his biggest stars were Mickey Mouse, Donald Duck and Goofy. Unlike the former trio however, Walt wanted to produce a fully animal-centric feature. Initially considering both "Bongo the Circus Bear" and "Bambi: A Life in the Woods" with the latter even having a few storyboards created, a failure to re-write Bongo and MGM producing their own version of Bambi (1) would scrap Bambi entirely while Bongo was shelved until at least the 1960s. After multiple story meetings, the storymen settled on crafting an original plot which took cues from the former two existing stories.
The main hurdle was what animals would be the stars of this feature. The earliest drafts dating back to 1940 depicted dogs as main characters, with a few early models even appearing in the live-action segments of "The Emperor's New Groove". Walt scrapped these plans as dogs weren't engaging enough for a feature film. On December 7th 1941, the first draft that resembled the final film was finished, this time centered around lions., Unfortunately, the attack on Pearl Harbour happened that same day, causing the film to be shelved until the early 1950s. During production, Walt brought in a few other animals for reference and organised trips to the zoo to observe the lions themselves.
Simba is a young lion cub raised in a small local zoo. The other zoo animals, especially a laidback meekrat named Timon, educate Simba about the differences between zoo life and wildlife. As Simba grows, he gets more adamant about being the "King of the Jungle", ultimately he breaks out his cage with the help of Timon and escapes to the wild, where they meet the lionness Nala. Simba and Nala fall in love and Simba greatly enjoys wildlife until he crosses paths with Scar the vicious tiger. When Scar threatens to kill Nala and Timon and terrorise the wild and possibly the big city after Simba's arrival, Simba must prove himself and his title of "King of the Jungle" by saving the day.
As the initial release window of June 1955 approached, Walt realised that he needed more time to set up the new Cinemascope format in theaters, as some couldn't support the new format at the time. As a solution, Walt delayed the film by a few months and would release two versions of the film: One in Cinemascope and one with normal aspect ratio. "The Lion King" polarised critics when it first released. The film simply couldn't live up to the hype of "The Black Cauldron" before it, and yet it's use of Cinemascope was what made the film stand out and earn its praise. Nowadays, "The Lion King" is a classic in its own right.
Release Date: September 5th 1955
Cast:
Mel Blanc (Simba)
Bill Thompson (Timon)
Barbara Luddy (Nala)
Taylor Holmes (Scar)
Notable Songs:
Bella Notte (sung by an unseen choir during the opening credits and when Simba and Nala fall in love)
(1) Sidney Franklin goes through with the plans of a live-action Bambi film and releases it in either 1938 or 1939.
Notes: I wasn't expecting to be able to get "The Lion King" out this early, considering OTL's version was more or less an original story. TTL's Lion King despite being obviously inferior to what we got IOTL, is still a Disney Classic in its own right, being the substitute and analogue of "Lady and the Tramp". Storywise, it takes cues from "Bongo", "Bambi", OTL's "Lady and the Tramp" and even the original STC's "Lion King". And yes, TTL's Lady and the Tramp would not feature dogs as main characters, or animals at all.