Once again Hippolyta is easily bested in combat. Admittedly, Tsukuri sucker-punched her, but how did she get to be Queen of the Amazons if a mortal could defeat her with such ease?
While it is obvious why an Amazon would like to rid the world of men, why would Star Sapphire and Tsukuri want to kill all men? They apparently don't realize that men are required to continue populating the Earth.
We never do find out why Aresia needed the gems that she stole and crushed into her allegen mixture in Part 1.
It's never stated clearly why the alien-but-male Superman and J'onn J'onzz are vulnerable to the Earth-manufactured allegen. Maybe it has something to do with the stolen gems and the (apparent) magic ritual, but who knows?
Hawkgirl: Yes, but who wants to live in a world without men?
Wonder Woman: They can't possibly be that essential to your life.
Hawkgirl: Don't knock it till you've tried it, Princess.
Aresia: Wait! You can't leave!
Tsukuri: I like you, but not that much.
The Flash: I definitely could have shown that bad babe a thing or two about guys. Too bad we never met. (belches)
Wonder Woman: Maybe it's just as well.
The entire Justice League appears in this episode but Superman and Green Lantern have no dialogue