They certainly have a good relationship with Sony, the key word here is COULD not would or even should.
Naughty Dog being owned by Sony would never be able to physically do that unless Sony gives them the okay, all it takes for Insomniac to do it is to destroy their relationship with Sony (not that its likely to happen), considering that they have worked with Sony for so many years that SCEA practically think they are family, I doubt they have any incentive to branch out.








