According to EzyDVD in Australia, LEGO Scooby-Doo! Blowout Beach Bash will likely be the next released Scooby-Doo movie. We also now have a summary for the movie:
Mystery, Inc. heads to Blowout Beach for a real swinging beach party. But when the Ghost Pirates threaten to harsh the good vibes, it's up to the Scooby Gang to get the party back on track and save the day!
Not much else is known at the moment, other than the movie will be 69 minutes long, and will be released on DVD in Australia on July 26, 2017.