So this makes Animal Man pretty much the only superhero with an unannulled marriage? I haven't been reading Earth-2. Are Mister Miracle and Big Barda still married?
The thing is that Aquaman and Mera being married doesn't fit into DiDio's problem with superheroes having to sacrifice anyway. Mera is not some worried housewife that can be leveraged against Aquaman. She is a superheroine in her own right, just ass bad-ass (maybe more) as Aquaman.
It is a stupid rationale on the part of Didio. Marriage can serve to ground a hero and give him or her something to fight for. Also, marriage is filled with sacrifice and hard work. And sometimes you have to spend long periods apart. Does Didio think that police officers, fire fighters, and soldiers should not be married?