Super Mario 3D World

 Super Mario 3D World is going to be the next platformer game in the Super Mario 3D series. The game revolves around the newly added multiplayer and the cat suit/power-up. The game was announced at Nintendo Direct 2013 and was on demo at E3 2013. The game is set to release in December 2013.

Multiplayer
Super Mario 3D World is the first game in the Super Mario 3D series to include multiplayer. Playable characters are Mario, Luigi, Peach, and Blue Toad. Their abilities are similar to those from the original Super Mario Bros. 2. Mario has the standard run and jump capability. Luigi jumps higher with a flutter kick. Peach can float in the air, and Blue Toad runs faster than the rest.

Cat Power-Up
When a player gets a cat bell (power-up name not confirmed yet), he or she will turn into a cat. The cat suit has many movements like regular cats... Also the cat suit can run up walls, trees, and even the flagpole at the end of a particular stage. This caused Nintendo to create more secrets that lie past of where players could have ever imagined. But beware, the cat suit can only climb a certain height before slipping and falling.
 * 1) Pounces like a cat
 * 2) Claws enemies like a cat
 * 3) Dives and lands on feet like a cat
 * 4) Runs like a cat

Power Ups

 * Super Mushroom
 * 1-up Mushroom
 * Starman
 * Fire Flower
 * Super Leaf
 * Cat Suit

Extras
Watch the trailer on youtube

Please add more information if needed.