I think I speak for a good few of us that the DC animated "Young Justice" has the best super-villain team of all time; THE LIGHT.
Easily based around the Secret Society of Super-Villains (particularly the "Infinite Crisis/ Final Crisis" that had an inner circle), this team has had a rotating roster of dangerous big bads.
Who do you consider to be your favourite members? And (considering it's changing roster) who would like to see join the Light at some point?
Example: Personally I'd like to see Talia Al Ghul and Count Vertigo join; and even introduce the Calculator. I would have said Black Adam, but considering he was used as a proxy in the Injustice League, he'd probably be mad about that (somehow I don't think he was in the know like Vertigo and Humanite).