I LOVE LUCIUS FOX...as a stand alone character he is awesome. I'm praying they don't kill off Lucius, I firmly believe that Bruce/Batman still needs his character even as Batman becomes more mature and comes into his own. I think they should keep Lucius as Bruce's technical advisor and keep Alfred as his moral advisor.
My favorite scene from Lucius in Begins was when he explained how he made a cure for the fear toxins & in TDK I think my favorite part is when he's explaining how immoral the global-cellphone machine was and he would help only once, but consider it his resignation...and his face as he types in his name and walks away as it self-destructs.
It's not just the character, but Morgan Freeman has somehow seemed to bring magic to any role he plays in this stage of his career.