@lemostr00
Admittedly it's been a while since I read the Getter Saga, but if I'm remembering the chronology right then in this alternate timeline I would guess Devolution comes after Getter Robo Go (replacing Getter Robo Arc). Like:
Getter Robo > G > Shin > Go > Devolution
These recent chapters have had Go as a character and he was introduced in Getter Robo Go. As well as that, Devolution focuses on the Getter Emperor and "will of the Getter" a lot, and iirc the Getter entry that explored the Getter Emperor + the Getter consciousness before this was Getter Robo Go - so to me it seems like a thematic continuation of Getter Robo Go.