God of Hope is a pretty lame title and I would never buy a game called that, let's be real, no one wants an Atreus game, let him have his little adventure off screen and people can decide what happens with head canon, Kratos growing as a character is fine but we all know the people want Kratos battling gods, not some annoying cringe character like Atreus heading up the series, at best give him a little spin off title
Not going to lie but "God of hope" sounds lame. Personally I found Atreus to be a rather annoying character as a whole, I don't think he's even a strong enough character to have a spin off game, leave his fate to people's head canons don't hand the main title to him. Whilst I liked the evolution of Kratos as a character, at the end of the day I want to play as Kratos, killing gods and big bad beasts. I believe if you remove Kratos, or the god killing, the series would die off rather quick