
First and foremost is the apotheosis of the father. Hal Jordan is the son of a fearless test pilot. As such he must live up to those expectations. He walks in the footsteps of his father, yet never feels he is adequate. Irresponsibility stems from doubt. Since he inwardly feels unworthy he, whether consciously or unconsciously, sets himself up to fail. The culmination of these fears occurs in his stalled descent in a fighter jet. Hal misses the opportunity to control his plummeting plane because he relives the moment of his father's death. Frankly this could have been played out more efficiently. With Top Gun and the parody Hot Shots, this scenario has the mark of cliche.
The we have the encounter with the gods and the call to adventure, these two scenarios being inexorably linked in Green Lantern. With the crash and imminent death of Abin Sur, Hal Jordan is selected by the ring and brought to the injured alien. Despite the information overload of being whisked through the air and confronted by an alien spacecraft, Hal shrugs off this disorientation when he spots the injured Abin Sur. This is one of the first of the tests and trials Hal faces in order to prove his worth as a hero.
Abin Sur, as messenger of the gods, offers Hal the power of the ring. The ring here represents the magical weapon, the gift of the gods imbued with the power to fight evil provided the hero is worthy. The lightsaber from Star Wars is such a weapon as is Thor's hammer. But with the power of the ring comes the responsibility of using it wisely. Hal, who has shown up to this point a knack for irresponsible behavior, must overcome his past self to become the hero of destiny.
The call to and refusal of adventure is treated somewhat differently in Green Lantern. At first Hal is eager to accept the call. He swears an oath must further prove his mettle in the underworld, here represented by the planet, Oa. Oa is home for the Green Lantern corps. It is the source of their power. In a mythic sense it equates to Mount Olympus or Asgard. Oa houses the gods. Journeying to Oa, Hal Jordan is first prepared in a baptism of pain. His body is made pure that he may interact with the gods, i.e. the other Green Lanterns. As he explores more and more of Oa, he encounters creatures stranger than the next. Now Hal is a visitor between worlds. His gift removes him from humanity and his humanity separates him from the aliens on Oa. At this time he is the most alone and the most vulnerable.
He is aided by two aliens, other messengers of the gods, who provide him with tests of skill regarding the mind and the body. It is Sinestro, though, who tests Hal's spirit. Sinestro, played by Mark Strong, enters as Hal's rival, filling a role for a bother battle. Hal must match or surpass Sinestro in skill to be found worthy. That Hal fails in this test is the seed of his decline. He rejects the call to adventure and returns to the Earthly realm as a quitter.
It is only when his own realm is threatened that Hal reclaims his charge. All this while evil has taken root on Earth in the form of Hector. A wayward scientist, Hector is infected with evil. It claims his mind, body, and soul. Hector is Hal's shadow. They love the same women. Both have father issues. Each is crippled by self doubt. While Hector is corrupted by his feelings, Hal acknowledges and controls them. He returns to Oa only to be refused assistance. The gods turn their back on him. He confronts the gods, and Sinestro, and oversteps his place.
Hal battles evil on his own, knowing that he is outgunned. He is fully actualized. He uses the skills he has learned along the way, as well as the magic weapon, to defeat evil. In his moment of self sacrifice the gods accept him and rescue him from death.
There are several other elements at work here as well, but that is the gist of the monomyth. It's pretty straight forward. This may, in part, be the source of much outcry against this film. Much seems familiar. Some have remarked that Green Lantern is just The Last Starfighter, failing to grasp that they share the same mythic elements, not the same story and characters. However, other films have been more effective in telling the story. While the script is not as sparkling as Thor or X-Men: First Class, it is a far sight better than the new Star Trek or Tron: Legacy. In short it falls somewhere between, sharing a spot with Iron Man 2. The principle actors surpass the script to deliver a movie that is much better than it could be.