The truth is that the SSE wasn't all that well received by fans and the media. Sure there are the fans that liked it but considering the hype there was for it many were disappointed.
Well of course, all games that have huge amount of hype for long periods of time like Brawl are bound to leave many disappointed. A lot of people were disappointed in Twilight Princess, a lot of people were disappointed in Halo 3, a lot of people were disappointed in GTA4, not to mention I remember a lot of people disappointment in Metal Gear Solid 4 last summer as well.
The problem with these huge games is that when they're hyped up for so long like all the games I listed above were, people start to expect unrealistic expectations for them, so when the final game comes out it's impossible for the game to deliver.
Had Nintendo never revealed Brawl at E3 2006 and instead waited until E3 2007 as well as never had the Dojo which just added fuel to delusional fanboys fire, the overall reaction to Brawl would have been way more positive. The same thing can also be said about Twilight Princess if it would have never been shown at E3 2004 and instead waited until 2005 or better yet, 2006. Because during the first year of waiting, fans are still being realistic, but after the first year goes by, they start expecting more and more until it reaches a point where the game will need to have 100 characters or 30 different dungeons, just to please everyone.
Which actually brings this topic about E3 again. I've seen a lot of people on the internet hyping up E3 this year because they think Zelda Wii will be revealed, which I think is rather foolish since it'll more then likely leave these people very disappointed. If Zelda Wii isn't going to be coming out within the next year, don't expect it too be shown at this years E3. After the sh!tstorm that Twilight Princess and Brawl caused, they're one of the main reasons Nintendo started their don't reveal games until they're almost done policy. Unless Nintendo plans on having Zelda Wii ready for fall 2009 or spring 2010, it's not going to be shown.
So if Zelda Wii isn't at E3, the earliest we can expect it is a fall 2010 release which means it might be revealed at Nintendo October conference this fall since that will be within a year though. Of course even then, it'd imagine GDC or E3 2010 would probably be most likely for it's earliest reveal.