I haven't liked a single superman movie to date, and as a result I've tried to brainstorm just how I would do a superman movie saga. What follows is a vague idea of what I would do.
The movie would start off on Krypton. It's very much taken from the animated series with braniac being the supercomputer that helps destroy krypton. We move to earth and things go as you'd expect (growing up in smallville etc...). Supes will be powerful, but toned down (he'd have trouble lifting a tank for instance). It will be established that he moved to Metropolis years before his first apperance as Supes so that it makes it more difficult to link the arrival of Supes to the arrival of Kent. Luthor pretty much owns the city. He wants to create a super police force that would follow his orders. As part of the experiment, the silver banshee is created and she is shown to the public. Superman would be a natural outgrowth of Clark not trusting Lex and his super soldier project. The movie would then be about how the city needs to learn to trust Supes over Banshee. Illegal activities would ensue, but Supes can't concretely link the goings on to Lex. Lex becomes angry and obsessed with destroying superman and as the film ends, strange files appear in Lex's database (sent by brainiac) explaining kryptonian technology and how it was used for advanced cloning techniques.
The public see Superman as a hero, but Lex is also seen as a good man too. Lex creates a clone of Superman using the info recieved at the end of the last film and some blood left by one of the battles with Silver Banshee. This clone would degenerate into Bizarro and Lex would be implicated. As the movie goes on, the clone continues to degenerate into doomsday and the two fight to the death. Lex will be seen as responsible and put into jail having lost all public backing. As the whole world mourns the loss of Superman, Braniac (who would have constructed himself a body by way of Lexcorp technology) steals the superman corpse.
I only have a vague idea of how it would go. Essentially, Brainiac would lead a massive invasion of earth. As this is going on, people would have to turn to lex luthor to save them from braniac. He would reveal another clone of superman that would be known as the eradicator. He'd send the eradicator against braniac, but then braniac would send a revived Superman (under mind control of some kind) against the eradicator and he would be victorious. With superman on Braniac's side all would seem lost until the discovery of kryptonite. With this, Lex is able to subdue Superman and snap him out of the trance. Supes will be sent to fight against braniac, but lex will get the final blow (thank's Secret Invasion for the idea). The movie ends with Superman not trusted, and Lex being the public's savior.
With the invasion over, Lex is running for President. He now knows Superman's weakness(kryptonite), and along with the fact that the people no long trust him anymore, Lex is not worried about Supes as a threat at all. It's here where I don't have all the details, but I figure that Lex would be up to no good and at the climax of the film, he'd don his battle armor (powered by kryptonite) and the two would have a climactic showdown. In the end, Superman is redeemed and Lex is done for good.
What do you guys think? What suggestions do you have? Do you have any ideas of your own that you'd like to share?