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- Eko is the Yoruba name for the city of Lagos (which is in Lagos State, the old Capital of Nigeria). His name is a symbol of the city. In Yoruba, Eko is symbolic of home, thus his name, Mr. Eko, resonates only with Nigerians who understand its true meaning.
- Adapts to life as a priest when he stays in disguise.
- Eko was killed by the Monster because he failed to atone for or admit to his past sins.
- Or it could be the opposite, Eko finally atoned for his sins and was ready to die.
- Well, he didn't exactly atone, he said he's got nothing to be sorry for and that he had not sinned, but rather survived.
- Eko was most likely scanned, as Ben was in 'Dead is Dead' and then judged, like Ben was in that same episode. Unlike Ben, Eko refused to admit fault and take responsibility for his sins. So, having judged Eko guilty the Monster killed him.
- Now we know Smokey is The Man in Black, a more interesting theory appears: At the moment, Eko was replacing John Locke as the "man of faith" and was the one who wanted to keep pushing the button on the Swan. Probably, MiB was considering him as Locke's replacement in his plans to kill Jacob, however when tested a last time, he found him unusable and disposed of him, perhaps because his strong and unwavering resolve and confidence, as opposed to Locke's pathetic defeatism and self-pity.
- Eko was building a church at the time he was killed by the Monster
- Eko atoned for his past sins, and the Island 'let him go'.
- The writers have said that Eko will reappear, but not necessarily in a flashback episode.
- People have seen 'ghosts' on the Island before. Jack saw his father and Eko saw his brother and Ana Lucia. Ben saw his mother. Therefore, the Monster will return in the form of Eko.
- "Yemi" set his tent alight in order to get him moving, to "kick start" him, so that he would venture out in to the jungle and find the Monster.
- The implosion of the hatch sent Eko back in time to the day of Yemi's death, giving him the chance to save his brother. Therefore in The Cost of Living the body could not be found, because Eko had changed the course of time and Yemi was never on the island.
- Eko tells Locke a story about The Book of Laws before revealing the hidden orientation footage. The story was about a king who built/rebuilt the temple with the book of laws. The book is also one of the items Richard presents to young Locke, supposedly the correct one Locke did not choose. Perhaps the unknown temple on the Island will be built/rebuilt by Locke.
- The Monster judged Eko the same way it judged Ben, but found him "guilty" rather than "innocent", so it killed him.
- Eko was killed by the Monster because, by letting go of his sins, was of no use to the Monster (as opposed to Ben, who was consumed by guilt during his "judgment", and thus could be easily manipulated)
- Mr. Eko was originally intended to be the Yin to John Locke's Yan - his opposite in every way. The black to his white, the tail section to his fuselage, the Jacob to his Smoke Monster, and the good to his bad. In podcasts during Season 2, Damon and Carlton strongly emphasize Eko's relationship to Locke, how the two have a very mystical nature and how they will take their different paths. A rivalry is seen to exist in many instances during their mutual time spent on the Island. For example, their Swan adventures in the Season 2 finale. When it was learned AAA would be leaving the show, it was made sure that the character's departure would be mythologically significant in showing how The Monster did NOT take kindly to him. His last words were likely either: "I saw the Devil" as can reportedly be heard faintly, which alludes to the Monster's evil; "You're next" as inferred by the audience, which would predict John's future connection to the Monster; or "You're all next" as may also be inferred, which may imply that judgment by the Monster would be coming.
Looking into the Monster
- When Eko looked into the Monster he saw answers to some of the mysteries of the Island. (e.g. lift up your eyes and look north). This is why the Monster killed him because it gave him too much information.
- The Monster's "face" which faces Eko during his first encounter with it is a bearded man which is Jacob (disproven).
- If the Monster is of religious nature, it disliked the competition Eko initiated by building a christian church.
When Eko died and whispered his final words to Locke, he announced them as "we're next." As confirmed in the November 6th podcast, Eko's final words to Locke were "you're next." This provides some ambiguity, though: Eko, in saying, "you're next," may have just been referring to Locke. If Eko meant "you all are next," Locke's interpretation would be correct - it refers to the Losties as a whole, or the group who went on the expedition to the Pearl.
- It is possible, as Hurley suggested, that his last words were referring to Nikki and Paulo who were the next people to die on the Island.
- It was also confirmed Nicki was bitten by a creation of the smoke monster rather than real spiders. if you watch the clip you can clearly hear the monster around her as she looks around, then the spiders appear. so this would tie in with the mosnter/eko's warning of who's next.
- From the way he said it, it looked like the words were meant for John and John alone, so i doubt it had anything to do with the other losties.
- He could refer to Locke as the next leader of the Others, the next guy who would be Jacob's spokesman, and that was who "the Monster said to Mr. Eko before killing him.
- Further to this point, Eko could have been the Monster's first choice to do his bidding by overthrowing Ben, and when Eko "didn't work out" so to speak, he made his comment to alert John that he was the Monster's second choice for the job.
- I have a feeling that Eko, as a man of faith himself, was in consideration, but in the end the Monster didn't like the idea. I don't know if Locke was a second choice, considering how much effort the Monster had put in through time.
- His last words may refer to the Monster's next victim, a.k.a. Nikki she was bitten by the Monster's manifestation of a medusa spider.
- Eko realized that the Island would never forgive him of his past crimes and he knew the Island would never stop until he was dead. So when he said, You're next to John he was saying that Island would focus on him now.
- It could be that the entity (or person) that showed himself to Eko in the form of Yemi was Jacob's nemesis trying to gain influence over Eko. Its failure led to the death of Eko and the entity instead turned towards John. We know now that Jacob's nemesis needed a loophole in order to kill Jacob and perhaps the last words, 'You're Next,' uttered by Eko to John meant that the nemesis began focusing his plan upon John.
- The Spiders are not manifestations, but rather part of the Monster itself, which would support this theory further.
- Eko was referring to John's replacement of Ben as the Island's caretaker.
- "You're next" was not Eko's last words. Locke lied about what he said for a yet to be revealed purpose.
- Eko was telling John that he would be next to be judged by the island. He soon faces his biggest fear, his father, as Eko faced his sinful past.
- Eko actually mouthed, "I saw the devil." This would coincide with John's earlier question of, "What did you see back there?...I saw a beautiful light." Eko responded by saying, "I saw the devil." The writers eventually changed it to make it more dramatic.