14. Batman: The Movie (1966)
Here we have a movie that is very much a product of its time, and yet completely timeless. Batman: The Movie was a spinoff of the classic TV series, coming fruition between the show's first and second seasons. It's every bit as outlandish and ambitious as the TV show, but with a larger budget and a much more complex plot than the typical capers of the week. The thing that made it so good is that it never lost the charm or simplicity that the show was known for.
This time Batman and Robin were up against four of their most nefarious fiends, as The Joker, Penguin, Riddler, and Catwoman teamed up to take over the world. It's as over-the-top and fun as it sounds, with plenty of battles (some on land, some in the sea), flying vacuums, and even a love story for Batman himself. I love this movie so much, and the more years that go by, the more it becomes a classic. It's everything that made the TV show a revelation (and a little bit more).
13. Superman II
Superman II is a bit of a difficult movie to rank because there are two different versions of the film. It's not necessarily as bad a case as the Justice League debacle, but even so, while the original version of Superman II was well received, the Richard Donner cut is considered a classic by fans.
Nevertheless, the movie was a strong successor to the original, bringing General Zod into play as a new foe for the Man of Steel to battle, while also having him align with Superman's archenemy Lex Luthor. It also dove deeper into the bond between Clark Kent and Lois Lane, exploring their relationship further in a way that only a sequel could have. It delivered on all of those fronts, offering up an adventure that proved itself pretty super in its own right - even if it couldn't match power with its predecessor.