On April 15th, the Xbox 360 servers will be updated with the next set of Spring Event quests. Here is a breakdown of the new quests:
- Protectors ? C-S3 - A new Event mission that features several boss encounters. Several new items will be introduced in this mission.
- Supervisor's Edict - Prologue mission updated for the Protectors Zeta.
- MissionLaunchPost 2 - Waiting Area for Protectors Zeta.
 
Credit goes to Amaury for bringing us this news. You can discuss this update in this forum thread.
 
Update: According to the JP PSU homepage, maintenance this week will be starting two hours earlier.