I don't think it'll take many hours to get through, though they could easily pass the low bar Vanilla Destiny set. I'm not expecting Dark Souls-levels of hours, but somewhere between 8 and 10 hours is good. Can't wait for the hidden treasures too. Always liked exploring nooks and crannies (teehee) in games. Here's hoping for a good story and plenty of booty to loot Big Gs!