Any film without merchandising rights in the film license requires Arnold's likeness rights holding company to be involved and approve. FOX only had rights to give Hot Toys the Predator licenese, the back and forth was that they had to get Schwarzenegger's people to approve the sculpt. The Terminator falls under the same conditions, his people would have to approve. Terminator 2 is covered by the film license, so if they got rights to T2, they could do that regardless of his people, I assume same goes for T3 and surely Salvation knows enough to cover such things in it's contracts.
