The facebook page also stated that.
https://www.facebook.com/deadoralivegame
DEAD OR ALIVE 5 Last Round will deliver the largest roster of fighters in any DOA game to date. Fighters will include: Hayabusa, Hayate, Kasumi, Ayane, Rig, Momiji, Leon, Kokoro, Tina, Lisa, Brad Wong, Jann Lee, Hitomi, Leifang, Christie, Eliot, Leon, Gen Fu, Bayman, Bass, Zack, Helena, Marie Rose, Phase 4 and newly released Nyotengu along with Akira, Pai, Jacky and Sarah Bryant from the Virtua Fighter series. Character customization options get even deeper, as DEAD OR ALIVE 5 Last Round will offer over 300 open and unlockable costumes, and the brand new hairstyle and accessory options will give nearly endless possibilities to adorn the fighters for any occasion. Players can bring their run of rosters, costumes and accessories from DEAD OR ALIVE 5 Ultimate, as previously purchased DLC content will be transferable from last gen consoles to the PS4 and Xbox One.
DEAD OR ALIVE 5 Last Round will be available at the price of $39.99 MSRP for PlayStation 4 and Xbox One (physical and digital)
and $29.99 MSRP for PlayStation 3 and Xbox 360 (digital only).
So you will need money again to update it. From my view it's worth the price.