Dead or Alive 5 will get a new DLC pack this month, which introduces a new stage in the form of Zack Island, as well as a series of gameplay adjustments.
The gameplay adjustments include dozens of minor tweaks to improve balance across a variety of characters, which you can read on the official DoA site. Most notable include bug fixes for certain stun-related events, as well as tweaks to the movie upload application.
New swimsuit DLC is forthcoming as well, in the form of three 'Hotties' Swimwear packs available for $4.99 each (or $12.99 as a bundle).
The DLC upgrade is currently available on PS3, while the Xbox 360 version will become available on January 29.