Superman II doesn’t really have a sense of building up the story as it supposedly takes place about a day after the original...
The movie sets into full motion from the start based an action sequences and continues the stretch of being action packed...
While Superman II manages to be fairly quick with the pacing, expand the characters, and provides some good special effects for its time (i.e. pre-computer graphics), the script on certain occasions can get so simple-minded, that the movie tends to lose a sense of anything logical. When the film tries to be very ingenious and/or showy in certain areas, it’s either pretty confusing or silly...Not to mention that the movie throws in an absolutely ridiculous ’’cop-out’’ resolution for the relationship of the main characters...
Still, Superman II manages to be very entertaining throughout and is definitely superior to the films in the series that followed (Superman III, which was ultimately hampered by awkward and juvenile humor and a certain devoid of action while Superman IV was ultimately hampered by cheesy special effects, a thin story, and some considerable derivation from Superman II).
Worth Watching...