Hello,
I didnt read YJ 17 already, but I have some questions (I read a review)

a) Review said that this Wonder Girl is Cassie from NEW52.
It seems that there is something in this Comic which confirms that.

b) This is (seemingly) the first encounter of Bart and Barry.
I read that they talk like they already know each other?

c) This issue takes place at the Leviathan events (in March Action Comics), so it means that it plays BEFORE the actual Action Comics....
So BEFORE Conner meets Kents etc. etc.

d) Is this girl Yolanda completely "new" or has she some ties with former heroes?
I first thougth on Yolanda Montez....