Mario Kart 3DS: What we want to see

I think the Wii/DS generation of Mario Kart was a very important one for Nintendo. They realized that the series has a much bigger potential than first thought. Both Mario Kart Wii and DS have become long-tail sellers, and they’re both still racking up the sales at retailers. That’s going to make Mario Kart 3DS a very important installment in the series. What’s Nintendo going to do to push the series forward and ensure a healthy life? What do we want to see happen?