Is Game Length Becoming a Concern

Hideo Kojima stated that Metal Gear Solid V: The Phantom Pain is so long (it is said to be 200 times bigger than Ground Zeroes), he’s worried that it would be impossible to finish. Batman: Arkham Knight is reported to be five times larger than Arkham City. So truly the next-gen is reaching full capacity, not just in graphics, but the length of the game as well.

Now, this brings the big question: is game length becoming a concern?