Leaf Shield is sounding like the worst Smash Bros. move of all time.
Jigglypuff's sing still holds the title.
The Wii U isn't in some sort of make-it-or-break-it situation, though. It's doing fine. Smash Bros is a big title that will push a lot of sales, and they absolutely want it out for the holiday season, but they've got other titles like Hyrule Warriors that will move units too.
The whole "if you're not number one you're gonna diiiiiiiiiiiieeeeeee" mentality with consoles is really strange.
The Wii U was doing horribly bad, and now it's only doing "bad". Don't paint the situation better because it's not. I'm not one of the people who thinks it will die or anything, but things are not good at all.