Hi,
here is an idea for a zone that would be pve and pvp at the same time : a big LABYRINTH!
Imagine that : 4 teams of 4 players spawn each at the corner of a big squared zone that is a big labyrinth : the goal is to reach the middle where there is a chest waiting to be looted. The hallways and walls of the labyrinth are randomly generated to some extent, and there are pve enemies on the way, elites and bosses. The only way to get out of the labyrinth is to die or reach the center, but if you die you cannot come back to it, you are just kicked out and back to your original zone. At some specific choke points, the teams can meet, and they fight to stay alive and kill other teams, in order to reach the center. What do you think about something like that ?
I thought about that because when I was younger i used to read a lot of gamebooks (lonewolf, fighting fantasy and so on) and I remember this book, "The Battlepits of Krarth"
or the French version of it