He is my villain cast for the superhero comedy. I figured to do something different since everybody on the serious side of the Justice League. This will not be like the Avengers at all but it will have more of the comedy like the movie did.
The plot will be the story arc of The OMAC Project but I have Not Modified it yet to include the comedy that will be need for it to work. So here is summary of the plot if you are not familiar with the story.
Plot
Lex Luthor is running for president of the United State of America. This is troubling news to the man of steel as he suspects that he has a hidden agenda. When Lex wins the election he campaign for the exile of all superhero with the help of Amanda Waller the Secretary of Metahuman Affairs. Batman does not like this and start investigating Metahuman Affairs and discovers information for a Satellite that detects metahumans called Brother Eye. Meanwhile, Amanda sends Sasha Bordeaux, part of the secret group known as Checkmate, to Spy on Bruce Wayne. OMACs (Observational Meta-human Activity Construct) have been spotted all over the world and have managed to kill several metahumans.
Checkmate is led by the White Queen, White King, Black Queen and Black King, each of whom have Knights of corresponding color. Through his machinations, Black King Maxwell Lord becomes the only leader of the organization, despite being double-crossed by one of his own Knights, Sasha Bordeaux. Lord is then killed by Wonder Woman to prevent him from continuing to direct the actions of a mind-controlled Superman. Brother Eye, the artificial intelligence directing the OMAC drones, initiates a protocol specifically designed to be used in the event of Lord's death and OMAC drones worldwide begin to wreak havoc and destruction.
Sasha herself is transformed into an OMAC-like being, powered by nanite technology. Batman and Sasha then work with the remnants of Checkmate and other government organizations to lure the majority of OMACs to the Sahara Desert. There, as OMACs gather to attack a large number of gathered heroes, Batman activates an EMP device that disables all of the OMACs, allowing their human hosts to be freed. However, the Brother Eye satellite is still hidden and has about 200,000 OMAC's still under its control.
Brother Eye overrides all television screens around the world and broadcasts Wonder Woman's killing of Maxwell Lord. People don't understand the circumstances, only that they're watching Wonder Woman murder a recognized Justice League colleague. Wonder Woman took a defeated OMAC to a hospital, and noticing everyone staring at her in fear, saw the broadcast and realized "They have killed my name."
Brother Eye prepares to launch an all-out war against metahumans to protect humanity. Batman works furiously to disable his rogue creation, while Wonder Woman and the Amazons of Themyscira face international backlash over Diana's brutal means (The OMAC Project, Wikipedia 2011).
Villains
Lex Luthor/Will Arnett

I picked Will because of his Smug and Arrogant comedy delivery like in Blades of Glory and Hot Rod. He knows how to play an intelligent asshole in different funny situations.
Mercy Graves/Mila Kunis
I picked Mila because the way she plays her roles in comedies like Forgetting Sarah Marshall and Ted. She can be serious and funny at the same time which is great for this character.
Joker/Adam Scott
I picked Adam because of his characters in Step Brothers and Knocked Up. He has a delivery similar to Will Arnett which I think will go well with Will’s style of comedy.
Harley Quinn/Jaime Pressly
I picked Jaime because she is a great comic actress plus she looks the part I think. She has played in many Comedic movies like I Love You, Man and Joe Dirt.
Side Cast
Amanda Waller/Tisha Campbell-Martin
I picked Tisha because like her serious and funny roles in movies like Zack and Miri Make a Porno and TV shows like The Protector.
Checkmate members
Maxwell Lord/Adam DeVine
I picked Adam because he was one of the best parts of the movie Pitch Perfect. He is one funny guy would be a hilarious Maxwell lord. I also love his role in Workaholics.
Sasha Bordeaux/Maya Rudolph
I picked Maya because of her long run on SNL and her role in Grown Ups. She would play the one member that will be tasked with watching Bruce but falls in love with him.
Mister Terrific/Donald Glover
I picked Donald because of his comedic roles on TV shows like Community and 30 Rock. He can make awkward moments even more awkward which I think will work will in the movie.
Huntress/Malin Akerman
I picked Malin because she looked the part and her comedic acting in movies like Rock of Ages and Wonderlust.
If you like my casts leave a comment below