Three new kingdoms have been found on the amiibo box art for Super Mario Odyssey:
>Lake Kingdom
>Snow Kingdom
>Mushroom Kingdom
That means that so far, there are 10 confirmed kingdoms in the game:
>Metro Kingdom
>Sand Kingdom
>Wooded Kingdom
>Luncheon Kingdom
>Cap Kingdom
>Cascade Kingdom
>Seaside Kingdom
>Lake Kingdom
>Snow Kingdom
>Mushroom Kingdom