The Feast, a PvP mode in which players will try to steal medals from each other, is scheduled to arrive a couple of weeks after the upcoming Patch 3.2. Initially, the Feast will launch with three types of arenas (one 8v8 and two 4v4 bouts), although two more arenas are in the works for a future date. Players will need to be level 60 and have gear item level 150 or greater to participate.
This new PvP challenge isn’t for idle duels; seasons are being scheduled with rewards for those who work their way up the ladder. The first season will commence with Patch 3.25, which should come some time after the Feast launches.
Source: The Feast preview