Even though you said it won't be realistic, I bet it will be that new driving game Nintendo is working on. You can have realistic characters and maybe some familiar ones *cough cough* R.O.B *cough cough* Mario. But this time it won't be like Mario Kart, it will be a simulation.
Miyamoto makes games from real life things he enjoys. Thats what inspires him. Awhile back I believe he said something about really enjoying swimming. Thats what people are talking about I think.
What's up with water?