Well just on the how the 52 will be started.
I didn't buy it but skimmed it and bought another copy of last weeks Tec (I mean that cover is just so nuts). So now we have the explanation why the revamp happens. Barry is losing his memories of that world and thus if he fixes it, that explains why some things remain or others change drastically. It's all Barry's fault.
Oh and Captain Thunder goes out like a punk and I assume Billy dies thus continuing this level of stupidity DC has with using the Marvel characters save for Black Adam.
Then Thawne finally shows up. Hopefully this entire series can be redeemed somewhat if FP Batman kills the fucker. I mean nobody will miss him? His return has been utterly pointless with two time travel stories that have done more damage then good. Plus the like Norman before him, the only time Thawne was ever good as a character was when he was eight feet under. It's sad, but a true fact. Don't give me Return of Barry Allen shit. That is a good story and that's the best anyone will ever write Thawne.
I guess the only consultation this event gave us some great Elseworld stories.