This is a theatrical release since Scooby-Doo has several animated movies. Most recently with KISS and WWE.
More importantly, Warner apparently wants to turn this into a connected universe with other HB properties.
https://twitter.com/krolljvar/status/633354238010114048
https://twitter.com/krolljvar/status/633354595721306112
https://twitter.com/krolljvar/status/633355233767198720
After more than a dozen years, Warner Bros. is bringing Scooby and his quirky crew of crime-busting kids to theatres, this time as an animated feature.
Tony Cervone, an Emmy-nominated animation vet who already has Scooby experience having directed several straight-to-own movies in the lucrative franchise, is helming the movie, which Warners has already slated for September 21, 2018.
More importantly, Warner apparently wants to turn this into a connected universe with other HB properties.
First, I'm hearing WB is toying to make a push for delivering a type of Hanna-Barbera universe like they are with DC and Lego
Besides SCOOBY DOO, expect news on TOM AND JERRY and FLINTSTONES movie and possibly a JETSONS movie coming out soon now that SCOOBY is dated
But sources stress the studio wants wheels movie on all fronts so that multiple films can be slated as soon as possible
https://twitter.com/krolljvar/status/633354238010114048
https://twitter.com/krolljvar/status/633354595721306112
https://twitter.com/krolljvar/status/633355233767198720