Here's the clip.
Arnold, Gerald, Helga, and Phoebe are all back and are on a mission to help Arnold achieve his ultimate dream of finding his missing parents.
Craig Bartlett, the original creator of Hey Arnold!, is also back as a co-writer and executive producer. The movie features new voice talent — Mason Vale Cotton voices Arnold and Benjamin “Lil’ P-Nut” Flores, Jr. voices Gerald. Lane Toran, the original voice of Arnold, and Jamil Walker Smith, the original voice of Gerald, will voice new characters. Justin Shenkarow is back as the voice of Harold.
Hey Arnold!: From Hillwood to the Jungle will be on Nickelodeon in 2018.