They say in the website that it takes place over 1000 years before gw1. I was looking over the known timeline a little, and I can’t help but notice that about that long ago is when the god war happens, the one which banished abaddon.

Also worth noting that it looks like abaddon is one if the six gods shown (also potentially dhuum instead of grenth?). If that second one is true it would put us a few decades before the god war happens, which sounds plausible?