If not a live action film, they could at least do an animated film with Dean Cain and Teri Hatcher providing the voices. DC Comics has been releasing direct-to-DVD animated movies regularly for the past few years now. A lot of them have been about Superman, and they change the voice cast up for most of them. I don't think it would be out of the question to make one set within the continuity of "Lois and Clark" with Dean Cain and Teri Hatcher providing the voices.