There are few problems with Superman Returns.
It tries to be continuation of the original Reeves superman so hard it's almost loosing all the plot. Why wasn't it done from the scratch, from the beginning, why are we getting PG rated continuation to cardboard cutout special effects early eighties movies no one gives a flying monkeys about anymore. Brando cameo aside, storyline starts in the middle of nowhere. Beginning of the movie - Superman is coming back, from where, why, no one knows. In the same time Lex is going somewhere (no spoilers), why, what is he looking for, who is he? Are we really supposed to know storyline of the original trilogy? 23 years later? Who is this movie for? It's gonna confuse the heck out of anyone born in the last 2 decades, it doesn't fit to nineties TV series, it doesn't follow smallville superman storyline, Lex is no longer in the same age group as Clark and Lane, idea wise it's back to square one but storyline is a middle of something. Most of the movie people who don't know superman comic books and old movies will have absolutely no clue what is happenning on the screen, who is who and why is everyone so wound up. And to be honest, with all due respect to Reeve, who on earth would want to sit through quite possibly three of the worst made shoe string budget sci-fi movies ever done in Hollywood just to figure out 2.5 hours long film with only one known actor in cast (btw Spacey is brilliant)?
Superman Returns shows how old the Superman merchandise is. If you never seen or dont' remember Reeve trilogy then for you it literally will be a strange story about a guy who opens his shirt and voila, underneeth he's got grease styled wig, fancy pijamas together with pair of brown bulletproof wellingtons. It will be nothing like good bits of smallville but it will have all the bits that sucked about seventies/eighties films. It's neither here, nor there and doesn't even make sense inbetween.