Diana’s origins

In the comics, Diana’s created from clay and given life by the gods, which explains her various powers and made her unique. But the origin story changes with the New 52, in which Diana’s story is retconned and she’s revealed to be the daughter of Hippolyta and Zeus.

The movie tells these stories, with the latter basically retconning the former. The clay origin story was supposed to hide the truth (and this is another Easter egg that you’ll find later) from Diana. The reasoning was simple, learning who she was would have revealed her to Ares.
We see that happening when she discovers new powers in her training with Antiope and gets closer to the truth. Man appears in the form of Steve Trevor, who’s then followed by the Germans in their Schwaben (the German ship that replaced the obsolete Mars – another Easter egg), and war and death follow.
