Are you speculating or are you certain? I was under the impression that older movies, where likeness rights were in doubt, were from a time when merchandising wasn't a part of the scene, and that these days most actors signed away their rights as part of their contract.
That is except for bigger stars that have the weight to sell their likeness rights separately. Depp may be one such actor, but even then it is one or the other. Either the studio has them or the actor. It would seriously hamper any legal negotiation, for both to have such rights, when someone wanted to sell merchandise. It would also then be a case of what time in their career an actor was able to negotiate their own likeness rights.