Original von FanboY:
The death theory is rediculous in my opinion to. It's plausible yes, but highly, highly unlikely. And when the title of the show is broken down it comes out to be: The new beginning of the End..
Evangelion is a complex series on it's own merits because Anno was literally mentally breaking down while making the series, .. you can see his mental state progress deeper into his own hell as the show goes on. But those complexities can only be taken so far, as the show and movie when looked passed these supposed "complexities" is rather straightforward and answers all the questions that need to be answered. The show and movie can only be so complex as you look into it, because it's such a weird nature on it's own.
Getting back to the death theory.. Shinji didn't take much damage that battle folks, the head was injured through the eye and back of it, but where is the pilot Located folks, not in the head of the unit eye socket of the unit thats for sure. Other than that, a broken wrist which was regenerated during that same battle.
Evangelion is simply the end of the world lying in the hands of the most unlikely of heros, a boy abandoned by his father only to be called to save the earth by that same man, who in his own perspective is afraid of love and therefore pushes Shinji away, but he loves his son dearly and is proud of him, but fears showing those feelings. Shinji is by no means a complex character, rather one who suffers from lack of self esteem, shyness, rudeness, fear of attachment, fear of the world and depression from his childhood. He is riddled with all these things and than add the burden of saving the world and all mankind to the formula, and when it does Shinji cracks, every episode he falls deeper into his own hell like Gendou.
The meaning of the series? Well, it's not that complex either.. the fate of the world lies in the hands of these children, destroy the angels save man and allow him to evolve to something greater than they are. Man can not allow itself to be whiped out by something other than it's own progress, therefore the angels, although 99.9 percent human, are in the way of mans evolutionary progress. So what does a human do when faced with something it does not want in it's way? Destroy it, so man wages war against the angels, the beings sent to earth to cleanse mankind of it's sins, but man would rather have it done by their own hands.
As far as the movie goes.. the movie takes place in the time span of the last two episodes. While Shinji is moping around and loathing through the entire movie, he's in deep thought finding himself, and when the last two episodes end, is when Shinji decides to return the earth to it's original state, and leaves only Asuka and himself to live (reference to Adam and Eve) to repopulate the earth, to see if mankind can rise to the top again and do things better this time around. Personally I see nothing complex at all about the series and the movie, it's relatively straightforward if you ask me.
And that's my 2 cents.