SPOILER:
The conclusion for this is simple, we've already seen Abbodon's imprisonment and eventual replacement with the God of Truth. Possibly the God of Truth, or Kormir-whatever floats your boat, will take a more active role in GW2 and we will see more of this sort of replacement. I could easily imagine a world where Menzies and Dhuum will gain much more power or overcome one or two of the current gods. Now, none of this can be assumed until GW:EN is out, i know. However the implications make me very giddy
a huge new lore to review of the time which has passed between GW1 and GW2 and the major world-shaping event which have taken place and how the lack of a hero has caused pain. Now, for the really far-out thinking...imagine a MONOTHIESTIC gw2. Doesn't sound too cool, i know, but thats also another plausibility. Perhaps the old gods were overthrown by Dhuum's and Menzies's combined effort and one of them turned on the other to take absolute control? I for one would love more involvment with godly affairs in gw and I hope they continue to implement that. In GW2 you will somewhere find a monument remembering the overthrow of abbadon and his servants and the rising of the God of Truth thanks to <imput char name>. A hundred years or two is a long time for things to happen in all of GW and we will have to catch up on that lore when the time comes XD

ie. Jade Wind, Searing, Destruction caused by abaddon, Cataclysm. It would be wise on A-net's part to let the world rest.
Not only did his attack on Shing Jea and Tombs go unsuccessful but just to kick him when hes down we foil Nightfall and then beat him up.