A new video by ZOS has been posted featuring Dragonstar Arena, which will be released with ESO update 4.
In Dragonstar Arena players fight as a group of four heroes against multiples waves of enemies. If they survive long enough, they get to fight against the reigning arena champions. Defeating the arena champions gives access to a reward chest.
There’s both a normal and veteran mode of Dragonstar Arena. The Veteran mode is tuned to be slightly more difficult than the 12-player Trials are.