The teaser shows a fleet of ships heading toward a waterfall flowing off an gigantic cliff, which seemed to have been created by giant chunks of the earth crumbling to bits.
Those who played the first game can probably guess what's going on, so I won't spoil it for you by offering my guess.
Little is known about the game at present, but Stoic said earlier this month The Horseborn would be a playable race in the game. The race wasn't featured in the last game, but it was implied they were Centaurs which roamed in nomadic bands across the southern plains.
The Banner Saga 2 is without a release date and formats have yet to be announced.