Here's a portion of the interview with Pak, who reveals that he'll be taking the fledgling heroes straight to Earth 2 where they'll meet older, more experienced versions of themselves.
"I'm really excited about this story because, like I said, we've got the young, raw Superman and Batman from our world, and now they're going to meet an older, more experienced and, frankly, stronger and better Superman and Batman. And also, the Earth 2 Superman and Batman have a very different relationship from the Superman and Batman in our world at this point in time. So they're going to be challenged on all sorts of levels. And of course, there's going to be be another threat — a sort of a big, worlds-threatening threat that all four of these characters are going to have to figure out what their response is going to be. There are going to be some great opportunities for all these characters to be challenged on multiple levels. And it's just really rich, meaty stuff. I'm having a blast with it."
Pak also name-drops Catwoman as one of the other characters the duo will be coming into contact with. There's plenty more at the link below so be sure to click on over and take a look.