I think it's strange that NRS included Black Adam and Sinestro but not Bizzarro, Reverse Flash or any other evil 'reverse' counterpart.

I'd never heard of Killer Frost before, but i couldn't be happier now that i've played as her. My flatmate has really taken a shine to Solomon Grundy but has never heard of him, either. I think it's all about giving the unfamiliar a chance.

That being said though, i'd love to have seen Darkseid be playable, as well as Bizzarro & Poison Ivy. It seems that they really should have included MMH as more than a background character too, to appease the fans. But if Skarlet can make the up-grade from background to main char, then all hope is not lost.

Even though I'm still a bit torn that he's not in the game, Martian Manhunter will surely make an excellent pitch for people to buy the next game.

Of course, in crossover games, it's never good to put all of the most popular characters in the first installment.

Cyborg for Martian Manhunter
Bane for Doctor Fate
Grundy for Swamp Thing

Ehh... I don't consider Black Adam or Sinestro "reverse" versions of Hal and Billy. Neither of them are really straightforward evil, either. They're both dictators, with Sinestro being a bit more of a scheming type. They can both exist easily without Hal or Billy and be completely compelling characters.

Bizarro and the Reverse Flashes are more dependent upon their more plainly obvious counterparts.

Take out :

Sinestro
Black Adam
Ares
Cyborg
Doomsday

Put in:

Power Girl
Poison Ivy
Zatanna
Huntress
Supergirl