Is joker or jokester?

Rating: 10/10 (9 October 2019)

A rumor says that this is not joker but the owlman ( who has the ability to control people's mind) from earth 3(a reversed universe) who in comics is also the brother of batman and jokester wants to destroy him, cos the universe is reversed. the story is The story of jokester who owlman narrate to the doctor at the hospital before he kills her.. What do you think?