The Return of Captain Invincible (1983)

IMDB
Genre : Comedy, Fantasy, Musical, Sci-Fi
TRAILER
Director : Philippe Mora
Stars : Alan Arkin, Christopher Lee, Kate Fitzpatrick, Bill Hunter
Plot : During WWII, Captain Invincible fought against Nazis using superpowers. Later falsely accused of communism, he retires in Australia. When a secret US weapon gets stolen, he's called back but struggles with alcoholism.