What, Zeus should be the Zeus of your pantheon. I mean, think about it.
"Oh hey there Dos Equis guy, I know you think you're something special, but here's what's going down in Chinatown. I'm going to turn myself into a mallard. That's right, a fucking mallard. You know what I'm going to do from there? What I do best, little man. I'm going to find your mother and give her hot duck loving. After that I'll disappear, and she will birth your younger demigod brother. Not only will your new sibling be better than you in every way, but when people ask who his dad is he gets to tell them 'Oh, a mallard. Now if you'll excuse me I have a seventeen-vaginad Siren-Medusa to bone mightily. I might push Iceland further south for giggles afterwards.'"