What about Michael?
Why wasn't he capable of dying. As I recall the fat gay guy who had a loud mouth said that Michael could never kill himself? Why not?
The "fat gay guy" I believe was Tom, and back on the island he was married to head of security until she died and Jack couldn't save her. Tom died on the island too at some point, in a bout of some violence or other.
I'm not sure why Michael couldn't die. Either he was still a candidate, or else he had a job to do in order to make up for what he had done on the island and he wasn't allowed to die until it was finished. Tom tells him that the island will not let him die until he agrees to go on the frieghter and kill all of the crew, as they are planning to kill all his friends.
(Which I think is why the last thing Michael sees is Christian Sheperd saying, "You can go now, Michael." He redeemed himself for his crimes by doing his job at the island and letting Jin leave while he tried to defuse the bomb alone because Jin was a father.)
Technically I think if the church scene at the end was an 'objective' view of everyone and not Jack's subjective perception, Michael should have been there; he paid for his mistakes and proved himself honorable. However, if it was a subjective view, then it would explain why Michael was not there (Jack didn't have regard for him), and also why Shannon might have been there (rather than Nadia, who Jack did not know) with Sayid. Objectively, Nadia should have been present with Sayid... except Nadia was never on the island.
Yes, it's a hodgepodge.
And Walt? Didn't he have some kind of power in which he could simply stare at a person and kill him/her? (if you don't recall he used it to kill his own mother and a bird). Is he the Darth Vader or is he Darth Sidious?
Who says he has to be either?
Not much of the Walt stuff was followed up on. I'm wondering if Michael hadn't taken Walt off the island (by murdering two of his friends) if the island would have had more plans for Walt. We only see him as an apparition later, when Locke is almost ready to kill himself. Are Walt and Christian in the same category -- "good imagery" the Island uses to accomplish its goals? What of TMIB pretending to be Jacob... if he did?
Ambigious and never tied up.
You can read
Lost TV Show - ABC Lost Episodes Recaps and News from the Lost TV Show
List of Lost episodes - Wikipedia, the free encyclopedia
LOST Wikia - The LOST encyclopedia you can edit!
for a lot of the detail of forgotten episodes (and About.com has close to a full transcript of each espisode).