Super President (1967)
3 episodes of the 60s animated series in which the US President is also a shape-shifting superhero on the side
Gatchaman - Episode 105 "Earth Extinction 0002"
Eerie stone statues appear in the fog. The Science Ninja Team walks around, searching for the entrance.
Collection: (Sort of) Superheroes
Some of these are "real" and some of these are parodies, but none of them are very helpful.