This is a character who has literally defined everything with fear. Taking it down from Batman is something that is like a supervisor badge of respect.

This Joker and Penguin are two of the only bad guys who have been able to scare the Scooby-Doo somehow. This is the only way they can have a worse plan if they are ready for a large amount of sandwiches.

After doing the opposite, Scooby plans to endanger the gang to scare the gang and to follow in the sight of delicious bones.