According to the Official website of Nintendo Japan, the upcoming event Nintendo World 2006 will be the first time people will be able to see the new characters moving in real game footage - those new characters being Meta Knight, Wario, Pit, Zero Suit Samus and Solid Snake.
The event is scheduled to take place in Japan at 3 different locations over the course of four seperate days:
November 3rd - Nagoya
November 12th - Osaka
November 25th and 26th - Makuhari Messe (Tokyo Game Show arena)
Although it is believed Brawl will not be playable at these events, it's great to hear some new footage will be surfacing soon - and even better it'll be some in-game action!