History WhatCouldHaveBeen / AdventureTime

* Music/TomWaits was Ward's original choice for the Lich, but instead they got Creator/RonPerlman. Both are known for their signature [[GutturalGrowler gravelly voice.]]

* During the episode "Simon and Marcy",[[https://www.reddit.com/r/adventuretime/comments/1b78r2/simon_and_marcy_theory_discussion/c949cj2/ Marceline was originally supposed to be sick to the point of nearly dying, with Simon looking for medicine rather than soup.]] This was changed as Cartoon Network executives were concerned this was too dark and potentially explains some of the episode's more absurd elements:

* There were also several changes to "[[http://www.scribd.com/doc/112716702/The-Lich-Storyboard The Lich]]". For one, Prismo is called "The Almighty Grob", but more importantly [[spoiler:the Lich would've been possessing Billy instead of having killed and replaced him, and Booko would have revealed that Finn's human dad was a hero who was wrongfully imprisoned in an impossible-to-escape dimension--with the implication that ''Billy'' put him there--and is still fighting the other inmates]]. This ties into several examples of TheArtifact. In the actual series, "Grob" refers to a powerful (but not ''all''-powerful) magical being from Mars (full name Grob Gob Glob Grod). This storyboard also reveals that Finn never realized that he was adopted (with a LampshadeHanging on the ridiculous levels of IdiotHero that would come along with this notion), which is obviously not the case in the series. Sadly this meant one of the series biggest [[SugarWiki/HeartwarmingMoments heartwarming moments]] ended up being cut as well.

* According to an interview with Pendleton Ward, the setting of the series was originally meant to just be magical. However, the episode "Buisness Time" which featured businessmen frozen in ice was when it was decided that the series setting would also be post-apocalyptic.

"What time is it? Seeing 'WhatCouldHaveBeen in [[WesternAnimation/AdventureTime our show]] time?' Yeah, man!!".

* [[http://rebeccasugar.tumblr.com/post/9693381246/fionna-and-cake-monday-at-8-adam-and-i-really Apparently,]] [[GenderFlip Marshall Lee]] ''had'' lines, but they were cut for time. Rebecca Sugar wanted him to be voiced by Creator/DanteBasco.

** A made for TV movie composing of four episodes was originally planned to air during the end of season 5 with the ending events of "Sky Witch" originally leading up to it. However, the film was pushed back and eventually canceled. Multiple parts and ideas from the film were later used throughout the series such as the beginning of the film being remade into the season 6 episode "Something Big", Orgalorg who was supposed to first appear in the film becoming the main antagonist of the season 6 finale "Hot Diggity Doom/The Comet" and the ideas for the dead worlds and how they worked being reintroduced in the Distant Lands special "Together Again".

** "Tower of Bone", a two-part episode for season 1 outline that never made it to the storyboarding stage, featured Finn and Jake facing off against the Lich after he manages to break out of his prison thanks to his minions kidnapping Tree Trunks after she accidentally swallowed the key to it.

** An unnamed season 6 episode which would have been a collaboration with designer/director/puppeteer and MacArthur Fellowship recipient "Basil Twist". While the episode was conceived in 2013, it didn't move past the early development phase.

** "The Malteser Penguin", an episode developed around the final few seasons, was originally going to focus on T.V. becoming a detective after his abilities for the jobwere shown in the season 6 episode "The Diary". While the episode was scrapped, T.V. was shown to have become a detective in the series finale "Come Along With Me" and took over Joshua and Margaret's old office.

** "The Malteser Penguin", an episode developed around season 7, was originally going to focus on T.V. becoming a detective after his abilities for the jobwere shown in the season 6 episode "The Diary". While the episode was scrapped, T.V. was shown to have become a detective in the series finale "Come Along With Me" and took over Joshua and Margaret's old office.