This movie ignores a lot of what makes Scooby doo. Such as character's catch phrases and recurring jokes. The biggest mistake they did is take out the mystery solving and the villain unmasking elements. Yeah, they've been done many times, but that is the formula that has been used for 50 years. There are ways to work around it, many older adaptions have done it. I feel bad for Frank Welker not getting the role of Fred. We don't care about celebrity casts, half of all kids probably don't even know who Simon Cowell is. The whole plot of Scoob! just feels like someone grabbed a random fan-fiction off the internet to rush production.