You're not the only ones to have this idea. There's that water pistol FPS on Wii Ware, and the Fireman shovelware game that's pretty good compared to other shovelware.

This is how I think it would have to be done: something like Unreal Tournament with less blood, intuitive controls, local online multiplayer (like Mario Kart Wii), plenty of game types and ranking only among friends. Bots would be crucial.

It would fail.

fps isn't blue ocean.
I get your point, but the fps crowd buys fps systems.
Nintendo isn't currently in the market to compete, they are in the market to get people to become gamers.
As far as the idea will allow, a blue ocean fps would be something like pokemon snap. A camera shooter.

Not necessarily, depends on how it was implemented, if they gave it a Wii sports sort of feel it might just work, the archery game in WSR is pretty first person

It's the current mold of FPS that is a red ocean. Nintendo would obviously break that mold, the way they have been doing.

I like d21lewis's idea. Robots could keep it sci-fi, and enable requisite FPS amounts of violence without it really being violence. Also making the gameplay less twitchy than most FPSes, since the robots could, concievably, take more damage.

I'd love to see an online Mario FPS, or one with an anouncer giving the play by play (with saying such as "Oh, wow!! What a shot!!" "It may have taken him 60 bullets, but he eventually got the kill and that's what matters," "This guy jumps off the top of a building, does a 180, and shoots the other guy through the window on the story below all while free falling.  Unbelievable," and "He sprayed 3 clips of ammo and still got nailed.  What an embarracing death.").

It sounds more like you want a disruptive FPS than a Blue Ocean one.

Disruptive is the word. And it very well may be a paintball fps in the next Wii Sports - would make perfect sense.

Or.

Perhaps they could do a Super Smash Bros fps? If it had a crazy fun factor, extremely innovative nintendo themed levels which was alive and had some real element to them and some crazy over the top action combined with accessability, like only using the wiimote(w/motion+ and b button for weapons, a for jumping) and the nunchuks add on's analouge stick only for moving around, it probably would work amazingly well.

I have a gut feeling that is actually what Retro Studios is working on atm. If they can make it hilariously fun, Nintendo will have another huge hit on their hands.

I don't know about a Blue Ocean FPS but I could see Retro releasing a new FPS IP. A new FPS from Retro studios would be amazing and they have been working on an onknown project for along time!