Disney's animated adventure 'Elio' failed to lift off at the box office, underscoring Pixar's continued struggle to launch original films.

Much was expected when Elio hit theatres earlier this month. The buzz was muted and the reception was mixed. Commercially, the film is raising serious concerns for Pixar.

Neither Pixar nor zombies were enough to topple “How to Train Your Dragon” from the No. 1 slot at North American box offices over the weekend.