I think the next Star Fox (NOT Starfox) game would be a good fit for the 3DS, I am not sure how eager Nintendo is to make a new one though. The last three have not been successful from a critical standpoint or a sales standpoint. O the other hand, none of those three were internally developed (they were by Rare, Namco, and Q-Games).
I am also not sure why the write of that article thinks Miyamoto was hinting at a new Star Fox game just because he said he would like to see a new one, executives have made similar comments about other series and had nothing happen.