An update to the Amazon listing for Super Smash Bros. on Wii U suggests that the title will include a stage creation mode and a board game mode not present in the 3DS version.
The listing mentions both the Master Hand — a longtime final boss of the Super Smash Bros. series — and Crazy Hand, the more erratic and unpredictable counterpart to Master Hand first introduced in Super Smash Bros. Melee. It looks like one of the new modes will include both Master and Crazy Hand setting up objectives for players to complete. Not much is revealed about the board game mode, other than that it will be competitive.
"Whether you're creating stages on the GamePad, competing in challenges crafted by Master Hand and Crazy Hand, or outwitting your opponents in a brand new board game mode, there's no doubt that the ultimate Smash Bros. game has arrived," reads the listing.
Additionally, the above screenshot featuring one of the Hands was posted this morning to the official Smash Bros. website. Franchise director Masahiro Sakurai also teased two new modes for the Wii U version featuring Master and Crazy Hand earlier this week.