Mary is seduced by the power of her Sergeant Shazam identity thanks to Granny Goodness provoking her.
Though Zatara has been freed, he is not back in the Justice League; he has to get used to his body once more, as he is now a decade older and thus has more health issues to worry about.
Vandal Savage gets the Lords of Order and Chaos to agree to let Nabu and Klarion remain the sole representatives on Earth: allowing Child to be defeated. Having explained the endgame of his alliance with Darkseid ends with a fight for the universe; if Earth falls, all free will, and therefore order and chaos, would be made moot.
End Credits: Zatara undergoes therapy with Dinah at the watchtower. Dinah tells him about the time traveling school bus Klarion possessed and how the victims took the experience to better their lives. Zatara denies that he's suffered much trauma being trapped for 10 years as Nabu's host, but ultimately breaks down in tears; comforted by Dinah.
Nabu now alternates hosts every week.