We can only assume that we will get the rest of the Suicide Squad eventually, but why not start with the most popular.  I know we are all looking forward to Jared Leto’s interpretation of the Joker.  From the look of the trailers I think Margot Robbie nails it as Harley Quinn.  If her statue is out of your price range then this action figure from DC Collectibles is what you are looking for.

The grand dame of the Suicide Squad, the unhinged Harley Quinn (Margot Robbie) comes all tatted up and extremely well-armed. The Suicide Squad DC Films Harley Quinn Premium 6-Inch Action Figure comes with her explosive collar (used to keep the villains in check during their missions), pistol, and, of course, her hammer.  It looks like you will have to wait until November for your own Suicide Squad Harley Quinn.