Green Day Unveil New CD Artwork

Of 21st Century Breakdown's message, however, we can expect more of the same: working-class heroism, the struggles against corporate America, war etc. "It's about reflecting what's been happening the past three years and putting it to melody with some bold statements."

One confirmed track, "March of the Dogs," is about "preying on people's blind faith."

"I'm all for spirituality. There's nothing more spiritual than rock and roll," said Armstrong.