If you are someone who enjoys, "Seeing how the sausage is made," when it comes to comic books, this oral history of the New 52 that Polygon published is a stellar read. They have one anonymous quote and note a number of people contacted didn't want to, "Spill any beans," as it were, but they do get some juicy insights from former DC head honcho Dan Didio (who we may recall was suddenly laid-off from DC in 2020 and has nothing to lose sharing his thoughts), Scott Snyder, Judd Winick, Christy Marx, and more. Didio provides a ton of info and even though his relationship did not end with DC on the best of terms as far as we know he doesn't come off as bitter at all, just a bit melancholic about how the New 52 ended up working out (long story short: it didn't work out well in the long run at all).
I always think of the New 52 as having a ton of potential it didn't quite reach. The article itself points out we all have an, "Underrated New 52 comic," that we feel deserved more attention (for me it is, "Men of War," without a doubt). The New 52 was a cool attempt at doing a brand-new relaunch/reboot and even if DC undid basically everything some years later, I have some fondness for the era. Reading how it came to be and end is a nice treat.