Tatsumaki Senpuukyaku!
Member
I doubt that very much. If Jared Leto had a whole film to himself playing The Joker it would just show how lame his performance was. To paraphrase Red Letter Media's Half In The Bag review: "Slightly quirky Marilyn Mason thug" is a pretty good description of his performance.
I'm actually of the opinion that they cut most of the Joker scenes to help disguise how bad he was. Any time he had more than 3 words of dialogue I wanted to facepalm.