8) The Morals Of The Team Are Murky
Given the team of villains and the similarities to Suicide Squad, you would probably expect the Sirens to be another group of supervillains gone good. However, they’re actually more complicated than that.
First of all, the Sirens don’t join together in an attempt to atone for their past actions nor are they assembled by some authority figure. The three women come together for their own best interests. If it suits them to stop a supervillain or save a civilian, they will. If it doesn’t, then it’s none of their business. Focusing a movie on such self-interested characters could be really fun and make for a more compelling arc than that of Task Force X in Suicide Squad.
At least, that’s how it is in the comics. To ramp up the scale for a film, we can see Harley compelling her friends to stop some apocalyptic event, after getting a taste for do-gooding in Suicide Squad.