Nintendo launches a successor to the WiiU in late 2015

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It will be too late ps4 and xboxone will had by this time a strong install base and library of game and will be not expensive to make so they can make a price cut when the new Nintendo home console.
It's better to Nintendo to wait the 9th generation and make a console as powerfull as the next Xbox one and Playstation 5 and try to attract both gamers Hardcore and Casual.