Collider's report, which comes from sources close to the production, say that the current roster will be lead by Elba's Deadshot, and involve Harley Quinn in a limited capacity. After that, the new Suicide Squad will consist of Ratcatcher, King Shark, Poka-Dot Man, and Peacemaker.
According to the report, Ratcatcher will be a gender-swapped version of the DC Comics character, replacing Otis Flannegan with a woman in the role. In addition to her ability to control rats, this character will also have an affinity for poisonous gas.
While all of these characters are intriguing for the big screen, the most head-turning bit of news comes with the description for Peacemaker. Apparently Gunn is keen on getting Dave Bautista for this role, after casting him as Drax in Marvel's Guardians of the Galaxy movies. After Gunn was fired at Disney, Bautista was instantly the biggest advocate for the director, so it's no surprise that the duo are hoping to work together again.