LogFAQs > #884800516

If you think about it, game series keep going until they bomb in sales and the developers abruptly decide to stop making them. I don't think we'll ever see many planned final releases because it'll sell too well and then they'll decide to make more of them because these companies are in it for the money, not to be recognized as making great art pieces like movies do.

Edit: Although there's also many movie franchises keep cashing in well beyond the point where anyone cares, like Saw.