The third Toy Story hits theaters today, but there are already plans for another appearance in your local cinema. Should we be worried about overkill?

Even though Toy Story 3 provides closure for the series, it's not the last you'll see of the characters, according to director Lee Unkrich:

We know that people love the characters, love Woody and Buzz, and would hate to say good-bye to them completely. I don’t know that there would ever be a ‘[Toy Story] 4.’ We don’t have any plans for one — but we are trying to find ways to keep the characters alive. We have announced we’re going to do a short film in front of ‘Cars 2′ that uses the ‘Toy Story’ characters. We’re going to keep them alive; they’re not going away forever.

/Film points out that that means we'll be seeing the characters again this time next year, if Cars 2 holds to its release date, but what's so wrong with the characters going away forever? Whatever happened to quitting while you're ahead?