Forgot to mention in the other post is that GP is simply preventing you guys from getting over excited over something that we don't know how will work in the end.
I mean sure it looks cool, but will it be fun? Single player adventure modes in fighting games have been notorious for not being that good (the adventure mode in the Tekken games come to mind). What makes the single player mode in Brawl any different?
As S_B will tell you hype can get your hopes up in the biggest way possible. When that thing doesn't meet your expectations the disappointment can be devastating. The single player in Brawl sounds really neat, but again we don't know how good it will be.
In short, despite how exciting something may sound its best to have a neutral way of looking at it. That way, if the thing is better than you expected it will be far more enjoyable and if it sucks you won't be as heartbroken.
You know the news that we should get excited for? The announcement of a fully working, 4 player online mode without the use of friend codes.
Now THAT is worth going crazy over.