Bill Cipher in a deadpool costume?

A bloody person/Zombie rotting away with tears in their empty eye-sockets. They're also missing their legs.

A giant fly with pilot-glasses is flying in the air, stealing scooby doo that is calling for help.

Flowers. Lots of flowers.

Scribbles. Lots of scribbles.

Asriel is casually screaming externally while Chara is in the background, screaming internally.

Mettaton is mad at how quickly time passes, throws a tantrum and probably ends up killing someone.

A guy got thrown out of a castle and into the sun

Illuminati.

A guy hurt his finger and is clearly showing you the damage.