Love it or hate it, the Ninety-Nine Nights series seems like a natural fit for the free-to-play MMO genre. As reported by Andriasang, that is exactly the next step.
Q Entertainment is collaborating with Taiwan-based UserJoy Technology on Ninety-Nine Nights Online. King of Fighters artist Falcoon is handling character designs and illustrations, and it's also been confirmed that this will release for PC with microtransactions.
Since it would be morally unacceptable for me to cover anything N3 without linking to that video -- you know the one -- here you are.
Q Entertainment Announces Ninety-Nine Nights Online [Andriasang]