https://wccftech.com/god-of-war-ragnarok-last-game-stretching/

God of War Ragnarok will be the final game in the Norse saga to avoid stretching the story too much, according to Cory Barlog.

Speaking with Kaptain Kuba in a new interview, the director of the previous entry in the series revealed that it was his decision to end the Norse saga with God of War Ragnarok. Both 2018's God of War and the upcoming sequel took 5 years to develop, and it would have taken around 15 years to cover a single story arc with three games, which Barlog considered to be too much.