And beyond that, through playing the beta, it is apparent that actions concerning the single player world has an impact in the PvP world as you can buy specialized(blue) gear/weapons/mods from vendors to bring into the dark zone that can be better than some of the average loot(green and gray) that can be found in the DZ.
I'm posting this because I'm concerned about the trainer request for this game.
It basically works like Diablo 3, except it has a PVP zone. You're always online and connected to the server, you can play solo or co-op through the story and PVP in the Dark Zone. I doubt the CH team will bother with a trainer for this one. Regarding loot, Ubisoft promises Dark Zone/PVP loot will be superior to the loot you can buy from PVE vendors or PVE drops.