Not only do I not agree with her, it sure sounds like she's got a Marvel bias...
http://www.washingtonpost.com/The-superhero-bubble-is-destined-to-burst-Warner-Brothers-making-a-mistake/
She's got a lot of glowing things to say about Marvel, but goes out of her way to condemn WB's DC movie slate. The implication being that if superhero movies become less popular? Then it's all WB's fault.
Right, because of course all the other studios like Sony and Fox aren't part of the glut of superhero movies, too. Gimme a break.