E309: New Super Mario Bros Wii, the trailer

Nintendo's newest New Super Mario Bros takes the polygonal realism of the DS version and puts it in HD, and adds four player drop-in, drop-out play to the mix. New powerups, as above, include the propeller suit and the ice-ball firing penguin suit, and the game now banks on the same "co-opertition" aspect explored in Zelda: Four Swords.

Like that game, you can rely on the other players to help get you through a bind, but they can also undercut you in a mad dash to collect the most coins (by tossing you out of the way, or refusing to pop your Yoshi's Island-esque bubble that you return to life in), with a multi-player ranking at the end of each level.