Ok, I have to update the list... Now the following are confirmed:
* = from previous annoucement
- = unsure from poster
Marvel:
Wolverine
*Spider-Man
Iron Man
Hulk
Captain America
Dr. Doom
*Magneto
*Storm
Deadpool (Fans gonna love him!!!)
-Black Widow
-Mephisto (hopefully not like MSH vs. SF where he's a pallette swap for Blackheart)
-Ghost Rider
Super Skrull (never heard of him...)
Capcom:
Ryu
Chun-Li
Morrigan Aensland
Felicia (YESS!!!)
Chris Redfield
Dante (you finally brought him in, Capcom!)
Frank West (he's back?!!!)
-Trish
(needs more Capcom people, but less Street Fighter characters)
Another Update:
Capcom's official annoucement:
(Link's fine, but it cannot be posted here because it has exceed the character limit)
QUOTE
Features
• Innovative graphics and gameplay bring the Marvel and Capcom Universes to life: Powered by an advanced version of MT Framework, the engine used in Resident Evil 5 and Lost Planet 2, now comes to Marvel vs. Capcom 3, bringing beautiful backgrounds and character animations to the forefront.
• Evolved VS. Fighting System: Wild over-the-top gameplay complete with signature aerial combos, hyper combos and other original systems. The evolved battle system takes the exciting mind-reading game to a whole new level!
• 3-on-3 Tag Team Fighting: Players build their own perfect team and use Assist Attacks and each character’s special moves to create their own unique fighting style.
• Living Comic Book Art Style: See the most adored characters from the Capcom and Marvel universes brought to life in a “moving comic” style, blurring the boundaries between 2D and 3D graphics.Of course we'll have more coming soon, and here are a few places you'll be able to find the good stuff:
Official Website: marvelvscapcom3.com
Twitter: @marvelvscapcom
Community: capcom-unity.com/marvelvscapcom
(Changed topic title to Official title)