Well, Jason's three shipmates wanted to spend time with Wonder Woman, but Jason wouldn't have it.
And, the big plot twist; Jason has been raised by associates of Darkseid to hate Wonder Woman.
And Jason has a very unique power that he uses to bring Wonder Woman down, when Grail was unsuccessful; Wonder Woman successfully dodged Grail's Omega Beams that she'd previously used to kill Hercules.
And Diana held captive; perhaps next issue will give background on Jason, but perhaps Diana in captivity will modernize Marston Era material. This was a very good issue, but maybe a bit out of sink with pacing, as it clearly seems to be more on the end of the spectrum for someone between about 13 and 16 rather than the adult end of the spectrum; my take based on the dialogue.