After Hey Arnold!: The Movie reached theaters in June 2002, Craig Bartlett and Nickelodeon planned a second Arnold feature. The project became the center of a dispute between Bartlett and the network, although the available account does not disclose the precise contractual or creative terms behind the disagreement. The conflict was serious enough that Bartlett left Nickelodeon rather than continue developing the sequel under the network's arrangement. He subsequently took a project originally conceived as a pilot for another animated series and turned it into Party Wagon, a movie-length animated special for Cartoon Network. The fallout effectively ended Bartlett's original Nickelodeon run for more than a decade: he moved through work at The Jim Henson Company and PBS before returning to the Arnold universe in 2015, when Nickelodeon announced Hey Arnold!: The Jungle Movie. The sequel dispute therefore became a notable break in the show's history, even though the precise source of the disagreement remains undocumented in the supplied account.
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