After the game update is released to the live servers on February 4, World vs. World will be down while our team performs additional verification. This is downtime needed because some issues can only be observed and verified in a live environment.
Because of this, World vs. World will be unavailable for approximately 2 hours after the release is available to the public. After that, you should be able to login and play WvW as normal.
Thanks for your patience and understanding while we perform these checks.