If you don't want spoilers, turn away!
Note that this is my first issue since issue 12, so things that are new to me might not be new to you.
So the first born is the son of Zeus and Hera. There is a flashback to the birth of the first born that reminds me of the scene where the amazon baby was taken away from his mother.
Not sure if it was intentional. Anyway, maybe it explains why Hera is targeting Zeus' children. Also I wonder if Zeus has a plan that includes fathering children all around the world.
ETA: I think Zeus knew about the prophecy and went into hiding, manipulating Apollo in becoming the ruler of Olympus and have him killed in his stead.
Siracca fights with Wonder Woman (atrocious dialogue here), but it gives a chance for us to see why Diana keeps Hera around. The end of the fight was great though: "... this is no way for sisters to act" as WW takes Siracca in her arms. Siracca accepts to help her but cannot hear Hermes, so she sends WW to their brother Milan (in New York).
The gods of Olympus are still talking, Ares is really not a happy guy (whole scene was boring to me).
Orion appears on the last 2 pages. Highfather is in the shadow and is afraid of the end of time, so he sends Orion to earth (sorry, no boom tube).
Art was uneven. The origin of Siracca was greatly rendered, but the fight was terrible, without energy. Storywise, the dialogues with the puns is still horrible to me, but it has a few nice moments for WW. It was again a very quick read. They could have squeezed one scene with Hera and Zola in there, wouldn't have hurt.
I give it a 3.5 out of 5. I might try the next one.