spoilers:
Most of this issue was a fight confrontation between Diana and Paula. Diana gives her version of the story of the Valkyries told to her where the Valkyries were the aggressors. Paula manages to plant some seeds of doubt into Diana's mind by pointing to the recent civil war started by Grail and Diana's experience on Almerac.

Donna thankfully flat out rejects the four Horsewoman's pitch. Too bad we still aren't given more details about her origin. Also I noticed Donna has her silver Lasso back. Neat.

Genocide is on Rampage through Boston to get the portal to Themyscira and is seen fighting some other heroes.

As I said in the preview thread I'm not sure I get this revised origin story with the Bana Mighdall(related by Diana to a class of children she's speaks to) being founded by Alcippe and their ancestor's having left the Island instead of not going there to begin with.
end of spoilers

I'm overall enjoying it and want to see where this goes. Really hope we get some firm answers on Donna's origin too.