In Skyward Sword, we see an upgrade system, where you had to get the right materials and a given amount of that type and some money to upgrade your items. You could upgrade your bug net, Slingshot, Bow, Beetle, even potions! I think in Zelda Wii U they could even make it better! They could make it more useful to upgrade your items, and maybe even make it in your best interest, by having really tough monsters in areas, where you have to either run and get hurt, take them on (be extremely hard, not unless your a pro), or go collect stuff to upgrade some of your inventory. Just by having really tough areas, would make it worth while. And they could also make it so if you wanted to complete some extra sidequests, you would have to upgrade your bow for example, so it could have a longer range, and hit like a switch that lets you have access to this extra area or something. Would you like to see an upgrade system in the new Zelda Wii U?