Production
Stakes was announced in February 2015 alongside news of Long Live the Royals, a separate miniseries created by Sean Szeles, at an upfront regarding Cartoon Network's programming for the 2015 to 2016 television season. Writing for Cartoon Brew, Amid Amidi speculated that both were commissioned following the success of Over the Garden Wall, the network's first miniseries created by Patrick McHale (a former writer for Adventure Time). Michael Ouweleen, the chief marketing officer of the network, later said that "miniseries provide the network with more opportunities to try different creative textures and give new properties a chance to get on air." Despite being touted by some outlets as a "spin-off",[2] Adventure Time showrunner Adam Muto later clarified that Stakes was considered part of the series' seventh season.[3]
At the 2015 New York Comic Con, Muto revealed that the miniseries originated with ideas that were initially developed during the show's second season. He remarked, "There was this idea from season two about Marceline and ... how she got her powers to begin with. We kind of rolled with that and expanded that into eight episodes." In a 2020 interview, former series creative director and storyline writer Patrick McHale clarified what exactly this original idea had been:
"I realized [sometime during the production of season two] that we'd never actually had Marceline and Ice King interact with each other in the same episode, and we'd also established that they were both 1000 years old. I thought that was meaningful, and so I started coming up with this whole elaborate backstory [explaining that] Marceline was the daughter of a demon and a human ... [and that roughly one thousand years prior to the start of the show] Marceline and Ice King were working together to save humanity [from vampires]. But Ice King was losing himself [to the ice crown], and it all landed on Marceline to fight off the vampires as the humans were escaping on an ark, set for some unknown shore. ... So in the final struggle, as a mutated horde of monsters and vampires come to kill the last remaining humans ... [Marceline] goes and fights the vampires with her demon powers so that the boat can leave. The humans make it, but Marceline is turned into a vampire. So she's stuck looking [like a teenager] forever, and Ice King is stuck being crazy ... and it's too heartbreaking for [Marceline] to ever even go near him, so she avoids him and lives in a cave ... Anyway, I pitched this whole huge elaborate thing to the writers room and they were like, 'That's cool, Pat.' But it was too much plot. Nobody was very excited about it.[4]"
Olson was not aware that the producers and writers were working on a Marceline-centric miniseries until the series' head writer, Kent Osborne, casually mentioned it to her in a conversation; when she learned of this, she reportedly cried because she was so excited.[5][6] Due to the Marceline-centric nature of the miniseries, a new opening was created that features Olson singing the theme song over a bass guitar.[7] This intro was storyboarded by Tom Herpich and was animated by Masaaki Yuasa's company Science SARU.[8][9]
The miniseries' story was developed by head writer Kent Osborne, series creator Pendleton Ward, Jack Pendarvis, and Muto. The eight episodes were storyboarded by Ako Castuera, Jesse Moynihan, Muto, Hanna K. Nyström, Herpich, Steve Wolfhard, Seo Kim, Somvilay Xayaphone, Lyle Partridge, and Luke Pearson. Andres Salaff, Elizabeth Ito, and Muto served as the miniseries' supervising directors, and Sandra Lee served as art director. Notably, the miniseries saw the return of several artists who had previously left the series, like Castuera (a storyboard artist who had left the series after working on the fifth season finale "Billy's Bucket List"), and Rebecca Sugar (a storyboard artist and songwriter, who had left the series after working on the fifth-season episode "Simon & Marcy").[10][11][12] Castuera storyboarded the first, sixth, and seventh parts of Stakes alongside Moynihan, and Sugar wrote a new song for the miniseries entitled "Everything Stays" and voiced Marceline's mother.[13][14]
In regards to the miniseries' cynosural song "Everything Stays", Nyström revealed that, during the storyboarding of the episode of the same name, she found herself unable to write a lullaby for the scene between Marceline and her mother. She relayed her issue to Muto, who contacted Sugar and asked if she would be willing to pen the song. Sugar agreed and based the song on an incident in which she lost a stuffed animal in a garden. A year later, she found it; the sun had bleached the exposed surfaces, but the underside was still the same. She explained, "[The stuffed animal] wasn't better, or worse, just different. It was the first time I realized that things will change no matter what, even if they're left alone, and stay completely still."[15] Muto was excited to have Sugar return to work on the show, and noted at the 2015 Adventure Time San Diego Comic-Con panel that "because [Stakes] was a Marceline miniseries, it wouldn't really feel complete unless Rebecca Sugar wrote a song for it."[16] At San Diego Comic-Con, Sugar and Olson performed the song live.[16]
Ghostshrimp, a background artist who worked on the series during seasons one through four, also returned to draw around 70 background pieces for this miniseries.[17][18][19] Ghostshrimp, who had left the series during the middle of season four, noted: "I was super pumped that they wanted me to work on it, [and] it was great to return to that world for another go around."[20]
