Sakurai teases a couple of Wii U-exclusive Super Smash Bros. modes

Super Smash Bros. director Masahiro Sakurai has teased a couple of exclusive game modes coming to the Wii U version of the popular brawler series' latest.

Taking to the Miiverse, the series director posted the following image of the game's menu under what appears to be single-player game modes. "Now, what mode is this...?!" Sakurai teased.

The first word of one mode is "Master", while its second half is blurred out, and the other mode begins with "Crazy". Any ideas what they could be?

Super Smash Bros. for Wii U will launch on 5th December in Europe and 21st November in North America. Its 3DS version had sold 2.8 million copies worldwide as of last week.