This Tuesday at CinemaCon 2016, the previously untitled Scooby reboot's (which will be released on September 21, 2018) name was revealed to be "S.C.O.O.B.". In addition, "S.C.O.O.B." will be the "our first shot at unlocking the Hanna-Barbera universe" according to director Tony Cervone, meaning that there will be other interconnected Hanna-Barbera reboot movies released in the coming years. Some concept art was also revealed at CinemaCon 2016, which can be seen above (credit goes to SpiderScooby over at ScoobyFan.net for finding the concept art)
Also see this post, which corrects an incorrect detail in the original post.