The Digital Bits confirms that Warner Brothers is finally going to have Richard Donner put together his own cut of Superman II. More about that, and the tangled history of that film, in this earlier post.
None of that solves the problem of Margot Kidder and her grating performance as Lois. Nor the mystery of why they used Kidder after Anne Archer made an excellent test for the part. But it'll help to have some of Donner's scenes put back, though part II will always have the drawback of not having an ending (it was supposed to end with the scene of Superman turning back time to save Lois -- which also explained why she forgot Clark was Superman -- but that ending was used for part I instead).