However, there have been fan campaigns, rumors, and speculations about the possibility of a revival or continuation of the series. In 2018, Nickelodeon aired a one-off TV movie called "Hey Arnold!: The Jungle Movie" which was well received by fans and critics alike.
So, while there is no concrete information about season 6 at the moment, it's possible that Nickelodeon could consider bringing the show back in some form in the future, especially if fan demand and interest remain strong. It is always advisable to stay updated with official sources, such as Nickelodeon's website or social media, for the latest announcements or updates regarding any future developments with "Hey Arnold!"