John 3.16-18

Kratos will not convert to Christianity without a poor game/story with an absolutely nonsensical understanding of Kratos and the series' "gnostic" approaches to traditional hierarchical religion.

Kratos and Atreus just submitting to celestial tyranny for the crime of being at least partly human is absolutely inverse to their characters and their general purpose in a story. They are agents of change, typically overthrowing a religious tyrant. "Forgiveness" for existing or not, submission, and by that, endorsement of the suffering of those in Hell for thoughtcrime, is not aligned with their new outlooks of empathy and respect. In essence, infinite torture as a threat for dental rejection is absolutely opposite to what their outlooks would allow.