This could simply be a placeholder website for upcoming God of War DLC. Or, this could be hinting at a new Ready at Dawn-developed PSP game we've heard murmurs about. In fact, Chains of Olympus was revealed in exactly the same way, via a website hidden in God of War II on PS2. Considering the franchise's penchant for announcing new installments alongside the latest releases, we wouldn't be surprised if this ends up being a brand new game in the God of War universe. Stay tuned.