It's Luigi time!
It's a weird addition, and actually confuses multiplayer. Super Mario Bros. co-op is precarious, a chaotic mess that only barely functions together to create a cohesive experience. Part of that is in watching what your allies do and copying them, because everything is moving too fast to react to the situation yourself. The Nabbit throws a wrench in those works, making it more difficult instead of simpler. It's also less fun to play--part of the fun of Mario games is in getting those upgrades, and watching them vanish is heartbreaking. On the bright side, the rest of the game looks to be pretty darn fun, so the Nabbit shouldn't stop you from having a good time.
Check out the following slides for additional images and more information.
The level design is wonderful, and should provide additional challenge for those who've already worked through Mario U.
The Nabbid just ignores enemies like he owns the place.
Playing alone will likely still provide the best experience.
Adorable retro goodness.
We actually don't even know how the Nabbit would work in levels like this...
...though he'd likely do really well in these areas.
Mario is missing.
Three more players doesn't always mean three times more fun.
The levels appear to be more difficult than those in the regular game.
Luigi hates ghosts, you guys.
...but he loves to spin around!
