I tend to agree with this. The Green Scar could just be a more mature version of the Savage Hulk. If Devil Hulk is the parent, Savage Hulk is inner child, Gray Hulk is the child pretending to be an adult, then it makes sense that Green Scar is the true adult personality within the system. The fact that Green Scar didn’t hide Bruce from Caiera and willingly revealed their connection demonstrated that his maturity level was greater than Joe Fixit’s was during his relationship with Marlo.