Yes, people were, as I recall, upset that 'Adam Knight' didn't turn out to be Batman. But DC wouldn't let them. That's not AlMiles' call. DC ultimately owns it all (and they, as I understand it, are very firm on Lois/Clark being together at the end of it all -- I heard that they let someone go because he was trying to shake up the marriage). From everything that I've heard, DC likes Erica's Lois. ED has done cons with the other Lois Lanes. There's an entire bloody documentary on the fourth season dvds about 'Being Lois Lane' that shows all the ways that ED's Lois is related to the other versions of Lois Lane.