Nah--that would be a wildly illogical conclusion (though it's an imaginative straw man. My compliments.) First of all, I don't think Hermes knew that Hippolyta and Zeus had been together, and he wouldn't have told Zola if he did. Secondly, I've already said the story doesn't exclude the possibility that Zeus appeared to other women as himself; but it doesn't
present that possibility, either. The story sets up and highlights a contrast between Zeus' typical extramarital affairs, described in issue 2, and the affair with Hippolyta, described in 3. Other exceptions, besides Hippolyta, are possible but never featured or referred to in the story.
No. Hermes is clear about that: "When Zeus consorts with a woman
other than his wife, he chooses a form that will inspire an uncontrollable lust...."
Or, he does it when he wants to "inspire an uncontrollable lust" in order to seduce them (or "to curry [their] favor," as Hermes also puts it on the same page). Hera didn't need to be seduced; sadly, as a representation of a typical traditional queen, believed it was her privilege and duty to make love with Zeus. Remember the desperate way in which she asked Hippolyta (in #4) how to make Zeus love her. I think it's pretty clear that "absolute control...given up" is not how Hera or anyone else would describe Hera's relationship with Zeus.
In Hippolyta's case, he was apparently able to inspire lust--and, according to her, something more than that--without need of disguise. (And even before he knew how passionate she could be about him in his own form, he most likely appeared as himself in order to "answer her prayers" by giving her a child--albeit the old-fashioned way.)
Incidentally, though to me it's besides the point, not all those old stories support the conclusion that Zeus employs disguise only with mortals:
"In the Orphic myths, the maiden goddess Persephone was seduced by Zeus in the guise of a serpent." (
http://www.theoi.com/Khthonios/Persephone.html#Zeus )
Also,
"MNEMOSYNE The Titaness of Memory was seduced by Zeus in the disguise of a shepherd." Not very exotic, and more like the disguise he supposedly wore with Zola--but a disguise nonetheless. (
http://www.theoi.com/Olympios/ZeusLoves.html )
No--and there's no reason to assume that they were, either. If I had to guess, I'd guess that if their mother is ever revealed, it will indeed be Leto; but if I were writing biographies based on what we know about the New 52 gods so far, I'd say that their mother is unknown. And it doesn't really matter. Even if she is immortal, Zeus may have appeared to her in disguise to inspire an uncontrollable lust in her. Even if he did not disguise himself, he may not have given her reason to believe, for decades afterwards, that he had loved her or surrendered control to her. In any case, it simply isn't part of the story, which simply contrasts the affair with Hippolyta to the description in the previous issue of Zeus' typical affairs with "women other than his wife."