I had a "Superman" marathon not to long ago were I watched them all, starting with the first one and ending on "Batman vs Superman." I felt liked the first two hold up very well and that is even including the fact that Superman doesn't even really have a huge fight scene in the first one. To me the movie's understood the nostagic value of the character and embraced that. To me that is what most of the Marvel movies have done , just with better special effects because like the first Superman the villians of those films also tend to feel like they don't matter to the success of the films.
Jason
Jason