I'm not sure if everyone has looked through the SSBB site much yet, but the biggest revelation of the "new" site is the music. By far. It's absolutely flabbergastingly amazingly mind blowing. Check out who is working on music for this game:

Tomoko Sasaki: NiGHTS music

Kenji Yamamoto: Super Metroid, Metroid Prime music

Yoko Shimomura: Kingdom Hearts music

Akihiro Honda: Metal Gear Solid music

Yuka Tsujiyoko: Fire Emblem music 

Yuzo Koshiro: ActRaiser, Streets of Rage music

Koji Kondo: Super Mario Bros, Legend of Zelda music

Among others. Link is here: http://www.smashbros.com/en_us/music/music01.html

I actually am not a huge fan of Super Smash Brothers: I like it, don't love it. Regardless, it's hard not to be amazed at the number of high profile people making music for this game. Several musicians from Konami, Sega, and Square Enix are involved. They pulled people from everywhere. Has to be a gaming first, unless someone has another game with amount of collaboration. 

It is impressive. Over 30 people from all over the place, clearly they have big aspirations for this game.

Just waiting for the "You will be able to play as Sonic the Hedgehog" announcement.

"Just waiting for the "You will be able to play as Sonic the Hedgehog" announcement." oh hell no

I think the announcement of the people involved with the music shows that there is collaboration from Sega and SquareEnix (that's what I can take from it all). Which means I'm assuming that some BIG NAME characters from past Square and Sega games will make the cut... it would seem weird just having Snake I think... there are HUGE possibilities from many different games... [speculation] Why do they need music composers from the following games UNLESS these composers are re-mixing the original scores for this game for the main characters from some of their games? GAMEARTS / GRANDIA / SYLPHEED - Grandia characters in SSBB??? Sounds weird, I don't know Sylpheed unfortunately NiGHTS - Why? PLEASE PLEASE PLEASE NiGHTS be in the game!!! I think this probably means Sonic as well, infact I'm deadly certain he will be in it. Monster Hunter / Devil May Cry - Dante in the game? killer7 GOD HAND - Viewtiful Joe? [/speculation] CBF don't any more, but my god that sounds amazing (pun intended)... I think I'm so damn excited about this game that I simply cannot wait!!! DAMN PAL RELEASES!!!

 Really does make you wonder.

Name	Works
Akihiro Honda (Konami Digital Entertainment Co., Ltd.)	Metal Gear Solid 4 Guns Of The Patriots / Metal Gear Solid Portable OPS
Arata Iiyoshi	Pokémon Mystery Dungeon / beatmania II DX
Asuka Ohta (Nintendo)	New Super Mario Bros. / Yoshi Touch&Go
Hajime Wakai (Nintendo)	Pikmin series / Star Fox series
Jun Fukuda (grasshopper manufacture inc.)	killer7 / contact
Kazumi Totaka (Nintendo)	Animal Crossing series / Yoshi series
Keigo Ozaki (GAME ARTS Co.,Ltd.)	PROJECT SYLPHEED
Kenichi Okuma	Melty Lancer series / Welcome to Pia Carrot!! 3
Kenji Ito	ROMANCING SAGA series / CULDCEPT SAGA
Kenji Yamamoto (Nintendo)	Super Metroid / Metroid Prime series
Kentaro Ishizaka (HAL Laboratory, Inc.)	-
Koji Hayama	Cho Aniki / Ape Escape 2
Koji Kondo (Nintendo)	Super Mario Bros. series / The Legend of Zelda series
Masaaki Iwasaki	MOTHER3 / Chelnov (Genesis)
Masafumi Takada (grasshopper manufacture inc.)	killer7 / GOD HAND
Masato Kouda	Monster Hunter / Devil May Cry
Michiko Naruke	Wild Arms series
Minako Hamano (Nintendo)	Metroid Fusion
Motoi Sakuraba	Golden Sun series / Mario Golf & Tennis series
Noriyuki Iwadare	GRANDIA series
Ryoji Yoshitomi (Nintendo)	WarioWare, Inc. : Mega Microgame$!
Seiji Momoi	METEOS / The Glory of Hercules III - The Silence of Gods
Shogo Sakai (HAL Laboratory, Inc.)	Super Smash Bros. Melee / MOTHER3
Shota Kageyama	Luminous Arc
Takahiro Nishi (GAME ARTS Co.,Ltd.)	GRANDIA series / PROJECT SYLPHEED
Tomoko Sasaki (TOKIOHEIDI)	NiGHTS
Toru Minegishi (Nintendo)	The Legend of Zelda: Twilight Princess
Toshiyuki Sudo (Nintendo)	Everybody Votes Channel
Tsukasa Masuko	Star Force / Magical Starsign
Yasufumi Fukuda	Kamaitachi no Yoru 2
Yasunori Mitsuda (PROCYON STUDIO CO., LTD.)	CHRONO TRIGGER / XENOGEARS
Yoko Shimomura	Kingdom Hearts series
Yuka Tsujiyoko	Fire Emblem series
Yusuke Takahama (TARGET ENTERTAINMENT INC.)	Digital Pinball series
Yutaka Iraha (GAME ARTS Co.,Ltd.)	SYLPHEED series
Yuzo Koshiro (ANCIENT)	ActRaiser / Street of Rage

Oh, Viewtiful Joe!  I was thinking maybe something from Killer 7...but Viewtiful Joe would make an excellent addition, even though he's not well known.