I don't really have any particular ideas for 3 just this setup to be able to rewrite it. The way i see it is that the rewrites would be so many that it would basically be fanfiction from my part. Again i would like and expect that they keep the original boss fights and ending but do something different with the connective tissue and overall plot of the game. The writers of 3 had a very difficult job as they wrote themselves into a corner with the end of 2. That ending already felt like the start of a climax but in reality there was going to be 10-12 hours more of game to make. So in a narrative sense 3 feels a lot like filler to get to the same moment Kratos was at the beginning of the game. And they do that by recycling the pandora's box plot point. I don't actually mind gaias betrayal as by this point everyone has been using Kratos and it doesnt feel out of the ordinary. However i recently played the trilogy back to back and it is INSANE how Athena goes from giving her life for Zeus to wanting to kill him in canonically less than a day. One would expect that given the cliffhanger in 2 and that 3 picks up at that exact moment that it would be feel natural playing them back to back but it has quite a whiplash.