If it wasn't for Batman: Arkham Asylum we probably wouldn't have seen the invention of challenge rooms hitting the scene for major game releases. But, because of Arkham Asylum, God of War 3 will use its downloadable content strategy on those challenge rooms.  GamePro magazine managed to have a chat with Director Stig Asmussen.

"It would make a lot of sense to be able to download [challenge rooms]," said Asmussen to GamePro. "That's something we might see in the future."

So you can probably excect God of War 3 to be shipping with a few challenge rooms already in game and then expect to see more added later on.

Via ShackNews