Board Thread:Questions and Answers/@comment-1038387-20120921185155/@comment-1038387-20130421154618

"We guys"? nope, it's them guys, Greg Weisman and Brandon Vietti.

Earth-16 is a "young universe"; after the heroes of the Second World War, the new genertion has only been active for 10 years or less. Because of that, the history of the characters is compressed into this universe's timeline. Robin was the first in the comics, so he's also the first here. As for Zatanna, she was introduced in the sixties as a young girl. Making her a bit younger helps fit her and her father in the timeline.