Ending parallels to <spoiler>
I was interested in how Gawain's final confrontation with the Green Knight seemed to parallel the crucifixion from The Last Temptation of Christ.
In TGK, we see Gawain run from what he sees as his death and final judgment. He goes back home and has what some would call a successful life, but it's all based on the lie of his having faced up to the challenge. He gets the kingship, an heir, what seems to be an advantageous marriage, more kids.... and then it all falls apart. Because, it would seem, it's all based on a lie and cowardice.
In TLToC (and I am speaking specifically of the movie and not any theological perspective), Jesus is offered a way out of his execution also, so he returns home, gets married, experiences loss, gets married again, has kids, and yet everything falls apart as people believe in a Messiah that he knows to be a lie. Jerusalem burns.
And in both films, in that moment of seeing how horribly it all turns out, both lead characters return to the point of sacrifice and declare that they want to fulfill the obligation. Even though both films end really in that moment, there's a sense that the path of the world is set right again by that voluntary act.
It feels that the underlying point is that sacrifice must, by its nature, be sacrificial. It has to be willing, even in the face of uncertainty and fear. One can't simply say, "Oh yeah, I did that" but dodge facing up to it because that introduces a fatal flaw, a deadly crack in the foundation of all that will follow.
It's an interesting idea.