Ok, maybe. That doesn't explain why Nintendo fans didn't buy:
I bought most of them. Zack + Wiki, Klonoa, Killer 7, Viewtiful Joe.
Although I consider Viewtiful Joe to be crap. Maybe I'm just too stupid to play the game, but for some of the boss fight, I just couldn't figure out any way to detect some of the super attacks via audio. And thanks to the crappy camera, I was beaten pretty often. I didn't enjoy the game at all.
Anyway, I don't really understand why the "typical Nintendo fan" should be really interested in Killer 7. It's a mature (real mature, not the game just being violent) game, with a complicated story. Quite the opposite of most games nowadays. And also the opposite of most Nintendo games.
There are many other examples too, the point is these seem like they should have sold well to Nintendo's customer base. For whatever reason, they tanked. Nintendo's customers either don't buy enough games or simply aren't willing to take any chances on new IPs
So just show me all those new IPs, that sold really really well on Sony or Microsoft consoles. We got and get sequel-galore everywhere exactly because of that. It's the same reason why Hollywood produces dozens of sequels and does shitty and unneeded remakes (Robocop, etc.). Because fresh ideas are a huge risk and the public may just not buy it.
And most of the games are also shooters, because doing anything else would be a risk. And plenty of them still flop. If we are lucky, we get light puzzles, because adding anything complicated could lead to less sales.
Naughty Dog even does another Uncharted for PS4, instead of doing something new. Because they hope that it will sells lots. And then there is also another Infamous game. And another Killzone. I guess Microsoft will do another Halo. And people complain about Nintendo doing sequels?
What's even worse, really horrible games like AssCreed sell pretty well despite their shitty graphics and shitty gameplay. And because of that the game was never fixed, but instead they continued with the auto-jump routine.
AT LEAST Nintendo changes a lot. Just compare Mario 64 with Super Mario Galaxy. That's not just a sequel. Or just take a look at Super Mario 3D World. Those are not sequels. They just got mario in the title.