I guess my point is that outside of flash, none of those characters are known to 95% of the world and most cant even carry their own comic in our circles that know who they are. DC's frontline characters are horribly dated in a superfriends world that doesn't attract large audiences to movie theaters.
They don't need to be widely known to be successful. I believe Iron Man I proved that. What matters here is whether these characters can be presented in a cinematically exciting fashion wrapped inside a good story and good direction and a good marketing campaign. That's where DC's problem has been. They have been way too Superman/Batman centric in their movie strategy. It appears to me that the problem is Warner is not synched up with what DC has to offer.
BTW, I believe Justice League and Justice Unlimited and the Brave and the Bold probably present a better view of the DC characters than the Superfriends of a couple of decades back. Those series may not be as popular, but the truth is DC has been fairly successful in the animation area than you seem to be giving them credit for.