Unless they go out of buisness, Nintendo will most likely at some point come out with a new gaming system. It seems unlikely that they will call it Wii 2, however, as Nintendo tends to give each of its console systems a new name. Furthermore, Nintendo has recently announced, that they do not see this console generation as over yet, so it will probably be some years untill they announce something new, and then a couple of years until that product will hit the market.