Actually, I liked the transition from Spyro to Rachet & Clank. By comparison, it would be the same as Nintendo creating a new IP and adding a FP aspect to it. FP is an area where Nintendo hasn't really done quite a lot, only game I can think of is Metroid, but there's a lot that can be done with FP aside from shooters. Portal proved that at least. If anything, if Nintendo does decide to create some mature IP later down the road, it would have to be something only they can do, and would take their experience in platformers/RPGs/etc into account.
I would rather not see Nintendo make a game that's Uncharted or Call of Duty, because imitations usually don't go over that well. Look at the 90s mascot era.
Zero Escape: Virtue's Last Reward = best game ever made.
