Two Tribes, the makers of Toki Tori 2 (which was confirmed for the Wii U) have asked their followers what they would like to see in the game. One follower said that they would like support for Steam Cloud. To this, the developers responded with:
Cross platform PC/Wii U saves! Wouldn’t that be nice ;)
And of course, it’s that winking-face at the end that makes it seem like the feature will be in the game, or is at least being thought about seriously.
Update: Unfortunately, Two Tribes has confirmed this was “nothing more” than a follower suggestion. So that’s a bummer.