Before you read my rant, read the Adventure Mode section of the Smash Brothers Dojo site...all of it.
I'm getting a little worried after reading all the information on Adventure Mode for SSBB. I'm starting to wonder: Is this what Super Smash Brothers all about?
Sure, we have all the great characters, items and stages for Brawl multiplayer. That section of the game is looking great, no doubt. It's the Adventure Mode that makes me wonder. Look at the baseline of the story -- space aliens, Subspace Armies, Robotic Operating Buddies. It looks a little to advanced for a Smash Brothers game, IMO. (I know Nintendo said it would not be to heavily emphasized, but it's still there.)
I don't like the idea of the pricesses being captured. You're probably saying: "But that's what the Mario series is all about, rescuing Peach from Bowser." Yes, you are correct in that way, but, this is Smash Bros, not the Mario series.
Yes, I must admit, this is a very creative idea from Nintendo, but it does not belong in a Smash Brothers game.
Remember when Smash Bros. first came out for the N64? That was a good Smash Bros. game, sticking mainly to multiplayer fighting action. We move along to SSBM, even more detail is added, new features and all. The Adventure Mode was good. Why? Because it was a simple concept to grasp...beat the enemy advanced to the next level and eventually fight the boss. Now look at the SSBB Adventure Mode, it's confusing compared to SSBM's.
Bottom line, SSBB's Adventure Mode looks to advanced and confusing to be in a Smash Brothers game. Sure, we're moving into the future and people want new features. Nintendo can do that for a Smash Bros. game, just keep it simple.