The legalities are complicated by potential trademark protection for movie characters. And also differences between countries. What may be legal in one place may be illegal in another. But never mind who "owns" a person's face. Who owns the photographs which you used as the base for the texture map? That's a copyright violation that would be pretty well universal. Sometimes, lawyers do seem to have no sense of fun, but considering what Poser figures can be used for, on this I have some sympathey with them.