Spolilers alert!
Up until like 20mins the movie seemed great where Shaggy meets Scooby and then the rest of the gang, and how they caught a perp at the haunted house. The animations seemed quite good as well. But then all of a sudden there's some bowling pins trying to kill them, some stupid superhero, Despicable me type villain with a stupid name, some robots with feelings, a Romanian park, giant dog skulls, a prehistoric island, a three headed dog, gold, a prophecy, a disappearing statue, Fred's captain America moment blah blah blah.. Despite including everything that came to their mind (Suprising that they didn't add some aliens too) they forgot the core of Scooby Doo. The team working together, a ghost chasing them around, looking for clues, setting traps that doesn't work perfectly but however manages to catch the ghosts, removing the mask and describing how they solved it etc. The plot was simply disastrous. The producers simply exploited the fact that huge Scooby Doo fans like us will definitely watch any Scooby Doo movie even if the ratings are bad.