User blog comment:AwesomeGodinez/Gravity Falls Movie/@comment-25305839-20140819231214/@comment-7783517-20140820051540

Casey Sander isn't a big actor and will probably never top Hisrch's voice. However, Adam Sandler could make a good Soos, he's great at doing impressions. However, I think for a movie based on a cartoon, keep the same voice cast for the show's cast, however, add in some big names for new characters specifically for the movie only (for example: Mindy was voiced by Scarlett Johanson in The Spongebob Squarepants Movie, but never appeared in the actual show).