Released on the Dev Tracker via the FFXI Official Forums are details of a new event. The first stage will be released in the May update. Up to 18-man battle fields against mobs called Voidwalkers… What made me giggle in the announcement was this…
savage entities that have breached planar bounds to invade multiple landscapes spanning past and present.
No, we cannot haz new zones for this! PS2 limitations! However, to be fair – it could be fun. OR it could be Walk of Echoes… we will have to see. I like the idea anyway and sounds like there will be lots of different battlefields/mobs to try.
I’ll be back later to post something meatier but this looks fun. Have the full announcement.
[dev1007] Voidwatch Emerges!
The forthcoming version update will feature a new battle system called “Voidwatch.”
In Voidwatch, bands of six to eighteen members will square off against “Voidwalkers,” savage entities that have breached planar bounds to invade multiple landscapes spanning past and present. By slaying these manifestations of terror, you and your stalwart comrades will gradually come to discover the true nature of the threat that has all of Vana’diel up in arms.
The upcoming May patch contains the first installment of this new challenge, and readies eighteen fields whereupon you will duel the dreaded Voidwalkers. The battle will expand to yet more areas in ensuing releases.

We will provide more information regarding Voidwatch in subsequent announcements, so stay tuned and steel yourself for battle!