History. 5 of 6. Elemental, Turbo, Kubo, Hoppers and Elio got there; Elio only just, in its 11th weekend. Abominable stopped at under three times.
Hunch. Forgotten Island meets two new animated family films on 9 October, Avatar Aang and Treasure Trekkers, and none of the earlier films met two at once in that weekend (Box Office Mojo calendar).
The US total market resolves on Box Office Mojo's page for Forgotten Island on 21 December: YES if the total to date reaches $45,524,518 by the weekend of 18 to 20 December. Variety and Deadline box office reports are the backup.
We looked for cases where a big studio's original animated film cost at least $50m, opened in US cinemas to less than a third of its budget and still got an A from audiences, with no holiday in its first two weekends. We found six since 2013. Three of them were Pixar films.