[quote=@Assallya]
Alternatively, the headquarters could reside on Earth-Zero or Earth-Prime from "Crisis of Two Earths"  (Available where DVDs are sold!)

That world, possibly that entire universe, was devoid of sentient and sapient life, a garden world and served as the template for all other worlds.

Owlman tried to destroy this world, hoping that all other worlds being variations of this one would cease to exist.
[/quote]

I'm familiar with Earth-Zero. I had some plans for it, but I didn't know if I wanted it to be the designated headquarters or not. I think I'm leaning towards it as being that. I might have to change some canon things to make it work but this isn't exactly a canon-bound game.