The set has been confirmed as having 13 models in it. The Suicide Squad along with Joker (Jared Leto version) and five henchmen (one of which is dressed as a panda).
Looks a great way to get into the game and share the cost...
It's £85, and if you pre-order you'll get a free Ben Affleck Batman. If you pre-order from KM you can get a second exclusive Harley model (a little it more). The buildings are reversible and stackable so you can make Wayne Tower.
It's pretty much everything you'll ever need for the game...