User blog comment:ScoobycoolDoo/Who's the mole?/@comment-174.52.244.230-20111120000546/@comment-1038387-20111120113038

They already explained pretty much all of Artemis's story in the comics.

They might need to do a little recap first. Only Superboy and (maybe) Miss Martian know, so Batman would have to explain it to the rest of the team.