Koei Tecmo has announced that Dead or Alive 6 has moved from its planned February 15th release, to the new date of March 1, so only 2 weeks later. Officially they have said it is because "developer’s desire to further enhance and balance", however I suspect it's because Feb 15 is the most packed day in gaming.
“The title's development is already near complete; however, we would like to take more time to further polish its balance, gameplay, and expressivity. In return for your patience, we commit to bringing you the best Dead or Alive gaming experience,” said Yohei Shimbori, the game’s Producer and Director. “I am truly sorry for the inconvenience caused by the release delay of Dead or Alive 6.”