User blog comment:Erockrule/Next Time On Young Justice " Darkest"/@comment-130.18.106.87-20120930223959/@comment-5324323-20121001122423

Bart's behavior in the Grotto, as you said, could mean nothing or everything. Everyone who should have been close to him (Barry, Iris, Wally, ect.) seem to have died before he was born or he was old enough to remember them. It could be that so many heroes have sacrificed their lives by his time period, that he's sadly become used to it. There's no indication he's met Artemis yet, making him more emotionally detached than the others. (Though, if she and Wally were to marry and have children in the future, he might know their kids/grandkids.) Or, he's in on the secret and knows better than to let on in this case.

(I loved his reference to the bronze statues traditionally used in the comics. Both he and Connor had one for a short period of time.)