Well, I assume, since some of the devs who worked on the great DAoC work on this game that it will be much like that games pvp dungeon darkness falls.

The faction with the most towers under control would be the ones to have access to it. Each faction entered from a different part of the dungeon which only a high character would survive getting to if solo due to mobs. And when another faction gained access they would flood in and try to kill off all the enemy players. Once you die you were removed from the dungeon. It had npcs with special armor weapons etc to buy and then you could proceed to pve in the depths of it where there was increased bonus exp as well.

What I liked doing was hiding out in there when another faction took control and wait for the dust to settle and the enemy think they killed everyone. I was a stealther btw. And then I would roam around and gank people till the point that word got out so much that I was around that people would form groups to find and kill me. Made for really fun rivalries too because you would begin to recognize the repeat offenders etc

I'm sure there will be a few variations of how they implement it tho.

Also, fighting for the right to gain access to it was a huge incentive to pvp and root for your faction, even as a low lvl I kept tabs on who had access because I wanted to lvl in there, the exp was insane. Made for great faction pride

http://elderscrollsonline.com/en/news/post/2014/05/01/the-road-ahead---may-1st

where he lists this