I feel like this is just Villiany 101 - Wait for the hero to get the loot, storm in after they've done all the hardwork lol. Though from a pure mechanics point of view, that would be pretty shitty if it actually played out that way. I think it'd almost be more interesting to both have to fight through a PvE instance. So... PvP and PvE combined!!! Though I suppose really that's just PvP with NPC bullet sponges in the way lol.
i think it will be like this maybe there are different modes to enter underworld easy (your team vs nids) tough (your team vs other faction vs nids) hard (your team vs other faction vs other faction vs nids) insane (your team vs other faction vs other faction vs other faction vs nids) and all will have the same objectives and will meet at anytime through the underworld (at least where the treasure lies)
Yeah i'd go for it, it might help make my exploits in the underworld all the more sweeter. Not to mention the loot i could get by smiting the ignorant ork boss and his group of "Boyz" with my Psychic powers.
Don't forget people there will be pve mixed in the pvp in the over world. The Nids will be taking outposts and bases of the strongest fraction.
YES, i want to be fighting other factions, and then some giant Tyranid organism comes up and all the factions either gang up on it and then kill each other over the loot once its dead, or continue to fight and get om-nom-nomed on