"It’s dangerous to go alone!”

This might be the most famous line of any video game, uttered at the beginning of 1986’s The Legend of Zelda, as an old man hands you a sword and sends you off on an adventure. It is also advice that Nintendo has been taking: With its announcement of a Zelda live-action movie, it has shown again that it knows better than to go by itself.

It has been seven years since the Kyoto-based firm first said it was venturing into the movie business and, ever since, it has been picking some smart partners. For the animated "The Super Mario Bros. Movie," the second-biggest earner at the worldwide box office this year, it turned to Illumination, the maker of "Minions," which has been producing the most consistently successful computer-generated family movies.