Dead or Alive could very well be heading to the Playstation 3 according to PlayStation: The Official Magazine UK. Well. It is still a rumor but it does make sense if you look at the facts. We already know that Dead or Alive 5 is a sure go and then the Dead or Alive: Paradise title for the PSP was announced, so it would make sense.
Although the franchise has been long synonymous with the Xbox 360, Itagaki (DoA director) has now cut off ties with Tecmo and therefore can take his franchise wherever he wants.
See the Official Playstation Magazine.