Nintendo fans demands constant innovation ??
No most of them just gobble up whatever Nintendo give them.
But yes, Nintendo innovates a lot of times for their main series.
Metroid Prime 4 has absolutely zero innovations, yet every Nintendo fan is hyped.
I'm one of the biggest Metroid fan here (my pseudo comes from it), but come on, a fourth entry in the prime series ? They couldn't think of anything else to innovate with the gameplay ? 3rd person Metroid has so much potential…
Kirby (how many 2D episodes before the 3D one ?), Fire Emblem, Metroid, Splatoon, Mario Party, Mario (all Sports really), Pokémon, Pikmin, Hyrule Warriors, Animal Crossing, Luigi's Mansion, Paper Mario, Xenoblade…
Most of those series keep iterating on the same basis. I don't mind it at all most of the time, but to say that Nintendo fans are more demanding about innovation… well no. They're just happy it is there when it's there. Otherwise they will buy the same licence they cherish from their childhood, or they're just kids who just want fun. And that's fine.
But MP4 just seems boring. I've played that gameplay 4 times already (yes the one on DS too), so I don't really care. I'll buy it because it's Metroid and I don't want it to flop so it'll be forgotten again.