And BeastBoy is basically a poor mans Animal Man + Martian Manhunter. lol Artemis is hardly female GA. You're thinking of the wrong Artemis, I'm referring to the Amazon, not the Young Justice teen version. lol I'm referring to this one who's a badass.
At any rate, we got Todd and Starfire, Sub so far. Looks like we'll be getting Raiden, Black Manta too. The others are a mystery though. Personally, I'd rather have Star Sapphire over Enchantress.
Just give me Constantine and Raiden. Constantine because I'm interested to see how NRS would create his move set. Raiden because he is the closest thing to a superhero the MK universe has tbh, and I think they would probably have to combine Thunder God with Displacer to make him work in this game, which would make for an awesome characater.