Except Naruto is a kids show and a common household name in Japan. It's like the Batman Forever: a terrible movie, but still highly profitable because of the large audience. The old Naruto movies were also terrible, but they still earned a lot of movie due to the brand.
Meh, when I was a kid growing up we had good shows like Batman: The Animated Series, that was also directed at kids, and yet had solid story telling elements. It lasted beyond many other shows that failed because of a bad premise. Had Batman ended by having Bruce married to Amanda Waller though I doubt it would be as fondly remember as it still is today.
Luckily when a franchise is handle correctly, you don't have to worry about something asinine like that coming up.