A bunch of whiny brats that gave them the $$$ to create The Wii in first place. 
EXACTLY. I've given Nintendo hundreds upon hundreds of dollars for their product. In return, they give me games that I'm not remotely interested in. I'm not happy with that. That's not whining, that's customer displeasure. If you ordered a steak well-done and got it rare and bloody, would you consider somebody that returned the steak to the chef a "whiny little brat"? Gimme a break.
That's why I feel so used from Nintendo. It's possible (probable) they couldn't have gotten this crazy success story that is the Wii WITHOUT the core, early adopters buying it for what we usually buy Nintendo systems for. I'm glad they're back to the top of the heap, but for crying out loud give us a reason to continue out brand loyalty! The rest of this year will have a lot of us core gamers looking at the other systems more than usual.
If we look at the Wii thus far we have a fairly solid collection of titles from Nintendo all geared to satiate the Nintendo "hardcore" crowd. We have seen Zelda, Mario, Metroid, Smash Bros, Battalion Wars, Fire Emblem, Mario Kart, Paper Mario, and Wario Ware on the Wii already. We also know that Nintendo is working on Disaster, Wario Land, Pikmin, Animal Crossing, a new Mario and a new Zelda.
Note that of the 15 titles you list in this paragraph, only ONE of them is a new IP (and it also happens to be the one that's most likely to be utterly mediocre). Like D_Average said, if you think that Nintendo is going to suddenly do a 180 and release a ton of new IPs aimed at gaming purists, you're kidding yourself. They've tilted the playing field up towards casual gamers, slowly causing traditional gamers to slide off to the 360 and PS3.
and if I remember correctly, Animal Crossing was one of their earliest tries at casual gaming, so to insinuate that it's a hardcore game (I'm looking at you Reggie), is nothing more than pandering...
I'll certainly get flamed for this, but I'll say it anyways: I no longer consider the Wii a "gamer's console" because as time goes on, there are less and less "gamer's games" for it. Those types of games have become the exception, not the rule. Flame away, but that's the way I see it, and Nintendo is doing nothing to convince me otherwise. It's like they've said, "OK, make Wii sequels to all of the franchises that our hardcore fans expect, and that should shut them up." I feel like Nintendo releases games like the ones you've listed only out of obligation, not because they really want to. It's like they try to keep up this facade of wanting to appease traditional gamers when they could really care less. It's pretty patronizing, actually.
If you're gonna get flamed for this, then I'll be the first to give you cover. I pretty much second every word you said. Hopefully there will be something more than "our Mario and Zelda teams are working on new stuff" later on in the year. Good to know Miyamoto and Co. are earning their keep at NCL, guys.
Interesting to note that a lot of us Nintendo fans put up with quite a lot of crap from them and their decisions through the N64 and GC years only to keep coming back hoping they'd do SOMETHING right to get them back into the game. Now, it seems the new found success from the decision they GOT RIGHT, may result in the final straw for a lot of Nintendo fans.
If it IS simply a case of putting on a "casual gamers only" show for E3, then hopefully, the powers that be at Nintendo are aware of the internet uproar and disappointment of their presentation and will at least refine said presentation. An awkward admission of a new Pikmin being made at the 11th hour. WTF?!
Silks, what size kevlar do you wear?