So this was a Marvel film from before Marvel started to create a ‘Marvel comic universe’? Graphic novel to film, like other Marvel films, but with no references to other films then.
Bruce Banner’s father was a scientist who tried to genetically manipulate the human body so that it would restore itself after injury, like some animals grow back severed limbs. Since he was not allowed to experiment on humans, he tried his potion on himself. This he transferred to his son who accidentally ‘activated’ the manipulation. This caused him to turn big, green and incredibly strong when he gets angry. I guess you know the story.
We have a young Eric Bana, an also young Jennifer Connelly and actors such as Nick Nolte and Sam Elliot. The film is largely a drama, but in a few scenes there is action. There is -of course- a military interest in the experiment and Banner is unhappy with his ‘gift’.