Length is always a key component for any game that remains focused on the single-player campaign.
Personally, I have no issue whatsoever with 8-10 hour adventures, as I can't spend the majority of my life playing video games. However, many hardcore gamers who play five or six hours in one sitting (presumably, they're all in college) want something more.
Therefore, they were hoping for a significantly lengthy campaign in Naughty Dog's hotly anticipated The Last Of Us . And while we won't be getting 20 hours, it seems we will be getting a game that is longer than any Uncharted title. During a video interview with Naughty Dog community strategist Arne Meyer (as cited by MadAssGamers ), we learn that 12-16 appears to be accurate:
"We’re definitely looking at more than 12 hours, maybe 12 to 16 right now is what we’re looking at, it really depends on how you play. You can play a little bit slower if you try to approach situations stealthy, if you really wanna explore the environment and scavenge, that’s going to add more time too."
Well, that's good. As I tend to play more on the slow side, it's looking like 15 hours for me. As for downloadable content, Naughty Dog confirmed in the interview that any expansions "will only be multiplayer-focused." That I don't care about in the slightest but I imagine others might.
Related Game(s): The Last Of Us