While I won't reveal any more about the book for fear of spoiling what I so enjoyed. What I will tell you is that I love Elseworld stories, and I think there is something malleable about DC that allows characters to be rebooted and blended and re-envisioned in ways that strengthens some central narrative well DC can always draw from (my current opinions on most of the New 52 notwithstanding). Earth One is one of those interpretations which makes the concept of alternate imaginings so great by refreshing a character people love for a wider audience that may otherwise be too afraid to dip it into the mire of years and years of comic continuity no matter how much they like the flicks.