Another aspect could be Kratos' journey through the realms in the company of goddesses. They could show him different perspectives on the world and the gods. For example, a goddess of wisdom could teach Kratos new ways of thinking and approaching problems. This could lead to his character development, making him more than just a brute warrior. He could start to use his brains as well as his brawn, and this newfound knowledge could be used to his advantage in future battles.
In fanfiction, Kratos might have a romantic relationship with a goddess. This could be a really interesting plot as Kratos is a complex character with a lot of baggage. The goddess could help him heal some of his emotional wounds. For instance, if it was a goddess of love, she might use her powers to make Kratos more open and less vengeful. However, their relationship could also be fraught with difficulties because of Kratos' past and his different values compared to the divine.