We finally get a glimpse of the origin story of the Joker. Directed and co-written by Todd Phillips (yeah, that dude behind The Hangover Trilogy; Old School and Due Date), Joker stars Joaquin Phoenix as the titular character. Loosely-based on Alan Moore's The Killing Joke, the film stars Phoenix as Arthur Fleck, a struggling comedian in Gotham City who suffers a series of setbacks that would lead to his transformation to the Joker.
Phoenix sees his role as a "character study" and his willing involvement in a project that "doesn't have a sequel" due to his reluctance in playing the same role in multiple films.
This movie is a stand-alone movie so we will not see anyone from the Justice League and, maybe, we won't even see the Batman. Hell, maybe in this version, superheroes don't exist. So, if you strip away the comic book elements, it can be said that Joker is an examination of a man driven insane by the world he lives in; Joker is a straight-up psychological thriller. We suspect that if Joker is a hit, then that would pave way for future stand-alone films utilising elements from DC Comics but not part of the DCEU (DC Expanded Universe). This could kickstart DC's Elseworlds project for film and TV by having DC Comics for stories that take place outside the DCEU canon.
It's a long strange trip for the Joker. At least, this form is more palatable…