While it's not a long piece, there are some interesting nuggets of information in the latest interview Jim Lee gave to USA Today. He talks about the interaction between DC Universe Online and the print adventures, which MMOs he's played, and how DCUO will differ from other MMOs.
It's in this last bit that Lee says something that might be a hint, or it might just be idle talk: "To me, that is kind of how superheroes fight. It's not like they stand there and trade blows. The cities are their playgrounds, and they demolish them." Can we expect destructible environments in DCUO?