I wonder how long it will be actually. If it's seven or eight hours, I'm happy, I don't need fifteen hours because it doesn't have MP or whatever, but just asset wise, from what I've seen, I can't imagine they have that much material to keep people moving at a quick pace for that long. I wonder if we revisit areas often.
EDIT: Top of the page, lame, now it lacks context and looks like I'm bitching.
Ken Levine has said that it's about as long as the first Bioshock.
So, we are looking at about 12-15 hours.