I absolutely love the way Kida and Sakuraba Handled the music, Being Kida my favorite Soul's composer.
If they are not gonna get Sakuraba again, I would vote for Kida to comeback.
However, If they truly want a new composer, I would go for Kouhei Tanaka, He's an amazing composer, his style would suit Soul series amazingly, giving it that bombastic feel Sakuraba gave to dark souls but keeping it classy, like Kida.
This is one of his works for Gravity rush
https://www.youtube.com/watch?v=B6bTuG_zDr0
If they are not gonna get Sakuraba again, I would vote for Kida to comeback.
However, If they truly want a new composer, I would go for Kouhei Tanaka, He's an amazing composer, his style would suit Soul series amazingly, giving it that bombastic feel Sakuraba gave to dark souls but keeping it classy, like Kida.
This is one of his works for Gravity rush
https://www.youtube.com/watch?v=B6bTuG_zDr0