Surprised this hasn't been posted yet.
It could be a lot of things but its possible that Super Smash Bros Wii-U, possibly the most anticipated game for the system which had an original release date for 2014 will get delayed. The Reddit gang are freaking out.
Supposedly tomorrows direct is to soften the blow to such an announcement. But at this point anything is game, it could also mean a different game all together.
But in short, if this is true, the Wii-U would be in huge trouble this year.