With regards to the N64, Rare stepped up to the plate on that one and delivered a lot of new IP's so the fact tha Nintendo didn't provide many wasn't an issue. Banjo-Kazooie, Jet Force Gemini, Perfect Dark, Conker. The problem is that those IP's didn't get a chance to develop since Rare left soon into the Gamecube era and took their IP's with them where only now are we seeing sequels come out for them. Now, obviously, the complaint is the fact that more than sequels are needed. Still, if those IP's were still around, it might help fight the "stale" accusations since they are a bit newer compared to other established Nintendo franchises.
The other thing that helped during the 64 era was the 3-D switch. In a way, every franchise felt new since they did have to adjust the gameplay to a 3-D world. Plus, Mario Party was new along with Mario Sports ala Golf and Tennis. Or are they the same franchise as Mario Kart?
Now let's discuss a different factor. Gameplay. For the most part, all of Nintendo's franchises offer a different kind of gameplay experience. Mario has different gameplay compared to Kirby which has different gameplay compared to Donkey Kong which has different gameplay compared to Wario. They are all platformers but they all do something different. They all have different gameplay mechanics. And in DK's case, he's been doing a lot of experimenting on gameplay lately. Or am I wrong here? Are they all the same thing? Just platformers but really well done.
I consider Battalion Wars a new IP but it was based off the Advance Wars games. Does that mean it is a new IP or not?
Another issue is third parties. On the NES and the SNES, there were a lot of third party exclusives that made it seem like Nintendo had more IP's. Square with Final Fantasy, Secret of Mana. Megaman was exclusively Nintendo at the time also, I think. Castlevania. Others like that. Growing up, if you didn't know much about the business, you just thought it was all Nintendo. The problem is, most of those third party titles have stopped being exclusive and now appear on all sorts of consoles. Sometimes, they don't appear on a Nintendo console at all. In this way, it again adds to the perception that IP's are lacking on the console. Even new IP's that appear on multiple consoles seem to be disregarded and not treated with much regard. Why is that people want to see Nintendo make new IP's but don't care about third parties?
I think they want the exclusitivity. Yes, we know that Nintendo will make a highly polished and excellant game. But third parties can do that too and have done that. But the issue always comes back to Nintendo. It has to be them to do this. I think it goes back to exclusitivity. When third parties left Nintendo, the routine has usually been to scorn them for this decision. Even I still do this on occasion. I was dead set against buying Rock Band after giving the 360 a brief period of exclusive release. But in the end, I bought it over GH:WT because I did like it more. So, I think the possibility should be left open to the fact that third parties could also deliver such a game even if it isn't exclusive.
Now, there was more I was going to say but there's a few things I would want clarified before going further. First, if I'm right about anything I've said so far. Second, must a new IP be epic? Trauma Center, for instance, is a new IP with an interesting gameplay idea. It may not be a very long game or epic in it's production. Is that still considered to mini-gamey? Professor Layton could be a new franchise. Since it is just solving puzzles, should it be dismissed? Chibi-Robo might not be the most polished game around but I loved it. The gameplay might not be revolutionary but at least it did something different with its setting and characters. Is that what is needed? Just something different even if it might be gameplay used in other games? Why must a new IP be a longer game that requires the player to master different skills and abilities in the game to face ever increasing challenges as you progress?