The Suicide Squad
Let’s get one thing straight: Amanda Waller and the Suicide Squad aren’t exclusive to Batman. They’re a bunch of bad guys (and girls) from across the DC universe and could serve as antagonists for any Justice Leaguer or Titan.
That said, spotting the likes of Deadshot and the briefest of Harley Quinn cameos in a Green Arrow show seems a bit off. They’re considered rather important to the Batverse and it’s fair to say they were largely wasted in their appearances here. Ignoring the horrible costumes or confusing castings, these characters were real bottom-of-the-barrel villains, serving no other purpose than being a “cool” reference point for the series.
What’s even worse is how most of the Squad got killed off in lame fashion, so there could be no confusion with the film’s version of the characters. Yet, there are two live-action Flashes and Supermen right now, and everyone seems to be cool with that… Sometimes, you have to wonder if the TV and film people even speak to each other at all.