Captain Boomerang
To make it clear, we are in no way fans of Jai Courtney. When we heard that he will be in the Suicide Squad movie, we immediately thought about all the movies he has ruined. But we might have been mistaken.
As said, his skill is also a pretty useless one "“ he is good with boomerangs and boomerang-like projectiles. Which cannot be effective when going against a mystical being. For that matter, if you were to choose, would you choose a boomerang or a gun?
This is, probably, the reason why we don't actually see him in action with his weapon of choice. But, even if we never believed we'd say this, he looks pretty awesome in this role. From the very start, when asking the doll to release him, to the point where he is delivered via mail service, and ending with the moment in which he makes opening a can of beer look hilariously awesome, he nails the performance.

Clearly, he is the wild card in a hand filled with wild cards "“ even the way in which he is delivered shows that he is like a rabid dog, which won't take orders so easily. And this makes us wonder whether or not he'll trade punches with other Suicide Squad members "“ yes, with Deadshot, who appears to be the de facto leader of the team (maybe that's how Boomerang got a black eye).

