It's an interesting question, and one that is destined to create plenty of discussion.
Sequels are huge in our industry and ongoing franchises are the cat's pajamas when it comes to massive financial gains. New IPs are risky and if a project is successful, the publisher invariably wants another game with the same title.
And I don't think anybody is going to complain that we got more than one Uncharted . However, all that being said, do you want Naughty Dog's recently revealed The Last Of Us to become a series or a trilogy? One source says that if you reverse-IP "lastofus.com," there are three exact matches for the domain: lastofus.com, lastofus2.com, and lastofus3.com. Other reverse-IP sites don't produce the same match, so perhaps this find is significant.
Either that, or Naughty Dog and Sony just wanted all the bases covered ahead of time when it comes to domains and searches. They may have no intention of turning The Last Of Us into a series. But that's the big question: should they? It's bound to be great, but can they keep both Uncharted and this new series going, while each continues to feature the same bar-setting quality? I.e., two award-winning franchises?
That could be a definite challenge.
Related Game(s): The Last Of Us