You know, I felt that in order to continue the franchise they have to change source material, cause they are simply running out of foes. I hoped that next one will be about Apollo (who is one of the most important Greek gods and still kicking) trying to reassure Olympian rule over mortal. Still, I knew the change is imminent, but not such change. The Egyptian or Presian or even Hindu would be much better fitted the Norse.
My friend had idea that Kratos wakes in Rome and relises people are still believing in same gods under different names. That he achived nothing and have to start all over.