Spoke with a few of my sources after seeing a teaser being previewed on the Dekaron Korea website. As most of us know, Dekaron Korea is where all new content originates.
The first two new classes (Concerra and Seguriper) were released and then Wizard and Halfbagi followed 8 months later. Dragon Knight was released around 2 months after that (so two months later). It's been well over a year since Dragon Knight was released and the final two classes are long overdue. These are rough estimates from my memory, so I could be a month or two off.
Dekaron Korea has been slow releasing updates due to various management changes such as UBIFUN taking over and having to help Global resolve some serious game issues.
The release of 2 new classes is imminent and more information and the announcement date has been set for July 20th. There are talks of some delays, though, that could mean the announcement will be pushed back.
Regardless, I'll be working on the files as they come from Dekaron Korea.
I've also decided that I'll be releasing the new class files here on EPVP shortly after I get them working.
Hopefully this will help bring new life to the Dekaron private server community.