The film is being directed by David Ayer and Leto is under consideration for a role in the superhero movie, said the Hollywood Reporter.
Robert Kanigher and Ross Andru created 'The Suicide Squad' team. It first appeared in Brave and the Bold No 25. Its most recent iteration includes characters Deadshot, King Shark, Captain Boomerang and Harley Quinn.
The story is about convicted supervillains who are given a chance to redeem themselves through dangerous missions. The film is slated for release on August 5, 2016.
He won the best supporting actor Oscar this year for 'Dallas'.