The Call to Glory update for PVP and WVW was released on Tuesday, February 25.
The biggest news from this update is the launch of mini seasons for PVP. These seasons will run between the regular PVP Conquest seasons. The first mini season will be 2v2 Team Deathmatch, and will run for a month.
This update also adds a reward track which lets you unlock a the new Guildrider Warclaw skin.
A major set of balance changes was also deployed as part of this update. Check out the official announcement and patch notes for more details.