So why shouldn't SSBB be online??
Well we have many proofs that it will be supported with online feature, so I don't see how can you have doubts people..
"As far as Wi-Fi play is concerned, Sakurai has confirmed some functionality."After that it would be a very stupid move from Nintendo to say that SSBB will not be online."My plan is to include Wi-Fi connection compatibility and online functionality. One of the primary reasons Super Smash Bros. Brawl was created was that Nintendo, when taking Wii online, wanted to have Smash Bros. to do that," added Sakurai.
I don't think that Nintendo wants to destroy all of our expectations trough the possible online feature in this game, by not being added.. they want this to be a great game.