I'd love to see the line between PVE and PVP muddied a bit. For one thing, AoC just has such good lore and it doesn't translate well to generic minigames. More importantly, there's a big practical and psychological gap between PVE and PVP that is hard to cross.
Bori was not a good example. I'm picturing more something like Borderlands (or a new battleground zone) periodically turning into a zone-wide PVE warzone, with NPC armies attacking each other and player battlekeeps. PVE rewards would be available through quests and world bosses that could be spawned in the zone. Then whenever player population in the zone is above a certain minimum number, add PVP rewards (bonus PVP XP, PVP quest givers, etc.)