Those are all characters that have been 'confirmed' by Playdom to be released, likely this year. Considering that Wasp and Captain Britain popped up early in the year without being confirmed, chances are really good that there's probably about five or six more heroes coming in addition to what's on that list already.
I would like to see Wonder Man U.S. Agent Angel/Archangel alt suit Ice Man Jocasta And Kang the Conqueror, he teamed with the Avengers to defeat Immortus once. so i'd LOVE to see him given the Magneto treatment.
Is that really Joe Fixit? In all the pics I've seen it looks like Grey Hulk, as in the original Hulk.
Links for pics of some of the alts, and characters: http://marvel.com/news/story/19080/sdcc_2012_new_characters_costumes_in_avengers_alliance http://marvel.com/news/story/19546/nycc_2012_new_characters_costumes_in_avengers_alliance
Second link has a pic of Grey Hulk
Civilized men are more discourteous than savages they can be impolite without having their skulls split. Official Phantom Stranger of the C&GN