User blog comment:Coopergang1/Season 2 Villain?/@comment-3044440-20130520013417

The Merlyn's are dead. Let's also add some of Black Canary's rogues, she doesn't have a lot but she has a few, Lady Shiva, Black Orchid [DC's Black Canary Archives from the Golden Age] so if we're wanting more #TeamLaurel, then part of season two will include her transformation and some introduction of her rogues gallery.

Canary & Arrow both share Batman's lower level rogues. So we could see some of the more loosely related Batman villains show up in Starling City. China White is running the Triads, so she'll always be on and off again.

Deathstroke is an Anti-Hero, I venture to say he'll show up to cut on Ollie later, but for now he's his mentor and friend.

We're probably going to see Ono, more of the Count in some respect, and yes more Deadshot, and quite possibly some Secret Six introductions, plus some Suicide Squad references. Marc & Andrew have been great about dropping the easter eggs.