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A lot of talking about the individual titles. For full details check out CBR's article and also Newsarama's article.
Big spoilers below:
Leading a round of applause for DC editor Eddie Berganza, Pak stated that it was Berganza’s idea to bring the heroes to Earth 2, calling it “Brilliant.” Adding that in issue #4, “Everything comes to a head...the chaos shard we have seen we will see it’s full powers unleashed,” Pak said, showing a page of an emaciated Batman and Batman punching Superman. Pak also praised Snyder for his help in talking over the story points.
Pak also said that artist Brett Booth will be coming on to give artist Jae Lee a rest, starting with issue #5
"Krypton Returns" cross-over event:
Lobdell also added that Superboy will die at the end of the event, calling it, “The ultimate sacrifice, giving his life in order to stop the universe from falling apart,” and from issue #26 onwards in “Superboy” the story will be about John Lane Kent, the original son of Clark and Lois. Lobdell also said that Supergirl, “Will be leaving the Superman family forever for another whole set of books in the DC Universe,” asking Soule, “Is there anything to add?”
“Now’s not the time!” Soule laughed, Lobdell telling the audience that they should be able to piece together where Supergirl will be showing up next.