A harrowing evil unlike the world has ever seen; a dreadful malice bent on conquest and chaos. It is this force that threatens to invade the world of Vana'diel in the very near future. The fast approaching May version update will bring about these "Voidwalkers", which will befall areas both past and present. What danger do the adventurers brave enough to try and route these invaders face, and what secrets do these beings hold?

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From Playonline.com:

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!