I knew it'd be bad news as soon as I saw the thread title but I couldn't help but click
I don't want to tell Miyamoto how to do his job but for a start having proper online races would be a start, maybe increase the number of vehicles in races, beef up the story mode, etc. It's games like F-Zero, Metroid and a new Star Fox - on top of the likes of X, Smash Bros and Mario Kart that would tempt me to buy a WiiU.
I guess on one hand it's nice to hear they're treating the franchise with care and respect but at the same time if Nintendo can't come up with ideas, why not do another collaboration with a third party dev and see what ideas they have and Nintendo can Green light their ideas or suggest improvements or whatever. As they said, they know fans want to see another F-Zero.