I remember Trine being quite the looker when it was first released. Going back and comparing that to footage of Trine 2, however, makes the original look dated by comparison.
Between the vibrant visuals and the amount of detail shown in the backgrounds, my eyes don't know where to look. This gamescom trailer shows the game's on- and offline co-op, serving as more of a reminder that the functionality is present than anything else. Also, this is where I would tell you Trine 2's release date if it had one.