Arkham Knight had you controlling Batman, Catwoman, Nightwing, and eventually Azrael. Wasn't there also a DLC to play as Harley?
They had been developing a Superman game but tossed it. Really hoping that flows into playing as Bizarro. And hopefully, they had bugs where he randomly crashes into buildings, so now it's considered a "feature". So who is on the Squad that I'd be interested in playing as... Harley, obviously. Croc could be a fun brute. Diablo. Katana. Deadshot. Are they gonna keep to the "no one actually dies" motif, where Deadshot is gonna snipe people with tranqs and electrical "bullets"? Boomerang would be hilarious. Blow yourself up as he did with an explosive boomerang. Solomon Grundy. Killer Shark. Reverse Flash to get a speedster. Deathstroke. Poison Ivy could be a lot of fun, here's hoping it's a separate/new story 'cuuuz...