I guess i'm the odd one out, but I hope they don't spice anything up. I think that Nintendo will keep the cel shading, because they see the potential that it could bring in animation, fighting, and particle effects. Miyamoto definetly realizes that they haven't used cel shading to its full potential, yet. Expect the Zelda on the next system to be realistic as The Big N tries to sway more people from buying a PS3. The next Zelda game on GC will be cel shaded, but it will most likely take place on the solid ground of Hyrule. There has been an absence from the land of Hyrule for two console games(MM and WW) and two Gameboy games( OoA, OoS; The new LTTP is simply a remake, which doesn't count on my watch). Look for the same layout as Oot, but in full cel shading. Maybe instead of Young + Adult, they go back to dark world + light world. This would be extrodinary in cel shading, and I would personally enjoy it more than age differential.
You people are fools to even discuss "Spicing" thngs up in Zelda. I do not want Zelda to be set when machines rule the world and some kill people for a living(Terminator), god that would be stupid. Or even a present day mafia Zelda, that would be even more stupid. All Zelda games are fantasy games and they will stay fantasy games as long as people have imaginations and buy the games, which will be a lllloooooonnnnngggggggggg time.