Display case reveals unannounced features.
http://www.nintendoworldreport.com/news/27931
The display boxes for Super Mario 3D Land, put out on Japanese store shelves today, revealed the game to have StreetPass and Super Guide features.
StreetPass will allow the exchange of in-game items between players, while the Super Guide will help players with useful items such as the P-Wing.
Exactly what items will be transferred between systems is unknown as of now.The P-Wing items first appeared in Super Mario Bros 3 on the NES, it allowed players to fly continuously across the level when used in conjunction with the Tanooki power up, effectively giving them an easy way to pass over the level.
Pre-orders have also officially started today in Japan, along with Kirby's Return to Dreamland on Wii.
Super Mario 3D Land releases on November 3rd in Japan and the 13th in North America.