I didn't watch smallville much, so I am not sure on Michael Rosenbaum's version of Lex. Anyway, IMO there needs to be a Lex Lutor in this next film, and he should use the events of what Zod did to turn people against Superman. At the same time use DNA from Zod, and maybe tech pieced together to make his own supermen. I wouldn't make this the main plot of the new movie, just a back story, while something else is the main plot of the movie. Of and put in a cameo of the New Bruce Wayne in this film, use is as a setup to any new Batman movie.