Also, since it's supposed to be the Fatal Fury series' 20th Anniversary...next year, I think...we can only expect more Fatal Fury characters lol. I'm convinced that a Tung Fu Rue- Jin Chonshu- Kid Vegeta Jin Chonrei team would be cool, now that they've brought Hwa Jai back from the grave.
As far as AOF characters go...the only ones I feel have any chance of returning are Lee Pai Long (if they're going for a Sennin/Old Masters team without wanting to move Takuma or Chin from where they are now, he'd fit in kinda nicely. He also was in NGBC...) and maybe John Crawley (Heidern - Whip - John as an alternate army-themed team to Ikari Warriors team?), although perhaps that's stretching it a bit. Also, wasn't AOF the game with the whip girl...called Lenny? ._.
@Sibarraz: SNK almost has enough boxers to make their own dedicated boxing game/based fighting game lol. Vanessa, Rick Stroud, SHEN WOO, Heavy D!, Mickey, Michael Max, Axel Hawk, Rob Python (Buriki One)...that's all I can think of...