Dr. Christian Shephards Legacy - Warning Spoilers from 3x12

In light of events in 3x12 is it a good idea to review all we know about Christian in a new thread?

Wikipedia have summed it all up below, Has anyone got a possible Christian theory to link the survivors and their landing on the island?

Wikipedia:
Dr. Christian Shephard is a recurring fictional character seen in various characters' flashbacks on the ABC television series Lost played by John Terry. He is the father of Jack Shephard and Claire Littleton.
Fictional character biography
Married to Margo Shephard, Dr. Christian Shephard fathered Jack Shephard and also Claire Littleton through an affair with Carole Littleton. He was the chief of surgery at St. Sebastian Hospital before his dismissal due to his son reporting him drinking on the job. According to Jack, Christian was the reason for Jack becoming a doctor; however, he was often hard on his son, encouraging Jack to avoid trying to save everyone and instead focus on letting go when the time calls for it so that he could "have what it takes". Jack says that Christian was hated by many people throughout his life, but instead of taking responsibility he blamed it on fate. Although Christian's relationship with his son is unstable at times, he occasionally provides Jack with inspirational advice, particularly the night before Jack's wedding. After his divorce, Jack suspects Christian of cheating with his ex-wife, Sarah, and the conflict results Jack in attacking Christian during an Alcoholics Anonymous meeting, and Jack's subsequent arrest. The stress of Jack's accusation leads to Christian falling off the wagon; Sarah tells Jack that an extremely inebriated Christian called her and begged her to bail Jack out of prison.
Later, Christian's drinking problem proves to be the major final chasm in the father/son relationship. While operating on a patient while intoxicated, Christian severed her hepatic artery (a vague accusation as the Common hepatic artery leads to the Hepatic artery proper before bifurcating into the right and left hepatic arteries), resulting in the patient's death. Christian manages to convince Jack not to report that Christian, operating under the influence, had caused the patient's death, but Jack changes his mind when he discovers that the patient was pregnant, ending Christian's medical career (by review-board ordered autopsy and Christian's confession were required since Jack's written recounts contradict each other, and are defensively biased as he too operated on Christian's patient). Christian and Jack never spoke to each other after this incident.
Christian later meets Ana Lucia at a bar in Los Angeles International Airport. After a brief conversation, he convinces her to accompany him to Sydney to serve as a bodyguard, saying that it is fate. After several days of drinking, Christian has Ana-Lucia take him to a house where he confronts a blonde-haired woman.
Christian then demands to see his daughter, but is beaten away by the woman, later revealed to be the aunt of his daughter Claire. The next day, Ana Lucia leaves Christian, calling him pathetic. Christian subsequently goes into a nearby bar and meets Sawyer, where he tells him that he is made to suffer by fate, explaining "why the Red Sox will never win the damn series". Christian then tells Sawyer about Jack, and how, despite what Jack thinks, he loves his son and is proud of him for doing the right thing, calling him a great man.
Not long after his meeting with Sawyer, Christian dies due to a heart attack caused by a high blood-alcohol content. Jack, in Australia looking for him, identifies his body at the morgue and has his body put on Flight 815 with him, so that he can have the funeral as soon as the flight lands in order to be "done with it". Jack finds Christian's casket on the island, but the body has disappeared. In "Walkabout" and "White Rabbit", Jack has visions of Christian on the island.
Although he doesn't tell Jack Christian's words at first, before boarding the raft, Sawyer says to Jack what Christian wanted to, finally allowing Jack to relieve himself of the guilt brought on by the death of his father.
Trivia
• Christian is among the few characters on Lost who crosses over to the flashbacks of other characters; rather than being confined to his son Jack's flashbacks, he has also been seen in Sawyer, Ana Lucia and Claire centric episodes. It is later revealed through Claire's flashbacks that he is her father, and therefore she is Jack Shephard's half-sister.