We have an established IP that people love, that we love to work on, with much more story left to tell in it, why in the world would abandon it to start over?
You had mentioned Titan Quest in the other thread as an example of a superior setting, and to me mythology is as generic as things get as far as source material is concerned. Doesn’t mean good games can’t come out of that material. God of War is one of my favorite game series, after all.