round 1:
In an effort to develop an all powerful weapon the inquest have mistakenly stumbled upon the secret to time travel. Obviously we can’t let the inquest interfere with the past so our heroes have been summoned to confiscate this new potentially destructive technology and end any plans the inquest have to use it.
round 2:
A more curious than cautious Asuran scientist has accidentally opened a rift in the space-time continuum. Strange things are starting to happen in the present and now the heroes must venture to the past to find the cause… Venture to Orr.
Seriously, Orr currently sucks. I hate fighting wave after wave of undead in a broken city there is nothing dynamic about it. What is awesome about Orr is the lore and the infrastructure you have already developed. I want to see Orr re-imagined as a functioning city with a unique and developed culture. I think this could be done in 3-4 zones 1-2 new dungeons and a whole bunch of new armor skins (and not tattered water-decayed crap with skulls and such). I think this would make a great DLC to develop and release when you start working on an expansion. (which i hope and pray you will handle expansions like you did with GW1: standalone games with a full games worth of content)