Our Summer of Spider-Man swings on with 2004’s “Spider-Man 2.” Flush with the success of the first film, this is a much more confident outing that’s also more clearly set in modern times, isn’t afraid to have a sense of humor, and makes great use of director Sam Raimi’s horror-movie resume. And at the center is perhaps the biggest reason for the film’s success: Alfred Molina as Dr. Otto Octavius, a Frankenstein who is his own monster, after having created a set of robotic limbs so intelligent that each pair needs its own jacket....