OK, so as far as I can tell, the only new sprites actually contained in 2.3.8 are for Mercy, Grail and Myrina. Grail and Myrina are pretty minimal, essentially a clothed and nekkid version of the same pose. The other stuff mentioned in the changelog, I'm not seeing it in the sprite assets, although I could have missed something.
So whatever groundwork is being layed down for Themyscira, I'm not seeing any of that in the sprite assets in 2.3.8 currently. I could have missed something (there ARE over 10,000 sprites) but checking alphabetically nothing else jumped out at me.
Anyways, here's Grail and Myrina nekkid, with Grodd just for fun!
View attachment 2018384
I'm not seeing a dong for Grodd in the sprite assets, of course we may never see that in SU 'cuz, you know, Patreon vs. Bestiality...