There's a huge Nintendo Direct focused on Smash 4 today, with information about all the final updates to the game - probably stuff like new characters and when Cloud is gonna be released.
That said, a ton of the leaks are just fakes, so I wouldn't really worry about it :P
I should clarify. Smash 4 had an update and the eshop had matinence last night. So leaks are spreading like a virus. So I want to avoid them un till after the direct today.
EDIT: Ya they could be fake, but I rather be cautious.