The joker is shown to be insane as he wears face paint and weird clothing.

Because he has a mental disability he will be the antagonist.

The destruction behind him shows he is going to do something horrible.

Joker is the main focus of this film poster to make people think how they are going to present him.

He is shown to be holding some sort of weapon showing he is violent.

His face shows he is unfazed by all of the horrible things he is doing.

His disability is not shown so it could be a mental disability.

The tagline says he sees the world differently implying a mental disability.

People can get the idea that he is lonely as he is sitting on a bench by himself.

White background to make the character the focus.

Background is simple as it could imply what goes on in his head.

You know the main character is going to have a disability as it is based off someone in real life with a disability.

Disability is not shown so it could be a mental disability.

Even though he is disabled he is still going to find love.

Background is simple as it could imply what went on in his head at the time.

His disability could be shown from the face he is doing.