Shikamaru Ninja
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Well, you're free to post a counter example of them not reviving an older franchise.
Originally Nintendo approved Raven Blade, Thunder Rally, and NFL Football. Of course all were cancelled to shift all resources towards saving Metroid Prime. Thus, the studio is not under a mandate to just recreate older intellectual properties.
It is the general trend that all Nintendo studios usually work with the vast catalogue of Nintendo ips. Nintendo just feels their dollars are spent better that way and that their usual market reacts better. But it doesn't mean it is outlawed or forbidden for a Nintendo developer to create a new IP if Nintendo believes in it.