Dead or Alive 5 has at least four fighters: Ryu, Hayate, Ayane, and Hitomi. Team Ninja just revealed the last two characters today and sent Siliconera these screenshots. Ayane comes from the first Dead or Alive game and makes occasional appearances in the Ninja Gaiden games. Hitomi is a karate master who returns from Dead or Alive 3.
Team Ninja plans to make the backgrounds interactive in Dead or Alive 5, which skilled fighters will be able to use to their advantage. Dead or Alive 5 is on track for release as a PlayStation 3 and Xbox 360 title in 2012.