I thought Zod was pretty much just Regime Superman.
I would have really preferred Power Girl if we were to get another Superman character, although Braniac, Parasite, or Livewire could have been some pretty sweet additions too. I'm really curious how Boon felt when he did that one twitter poll though. He pit Batgirl up against Supergirl and Power Girl and Power Girl won in a landslide. I'm sure before that poll was made, they had already decided what the DLC characters would be, but I bet seeing those results couldn't have been a very reassuring experience for Boon.
Still, I plan on enjoying Batgirl regardless. I just hope that Zod and Scorpion turn out to be red herrings and the last two DLC spots are for different characters. Preferably with one of them being Martian Manhunter.