My fear of 'LOST' getting 'LOST'

A few years back there was a trilogy of movies: Matrix, Matrix Reloaded, and Matrix Revolutions. Matrix was a pathbreaking movie: amazing graphics, excellent action, awesome sounds, and thrilling story. Everything about the original Matrix was mind blowing, including the concept that we all are living in a 'virtual' world. I remember thinking at that time whether it really could happen, that I am living in a virtual world. The sequel to it (Matrix Reloaded) was good on action, but somewhere it lost the thrill in the story that the 1st part offered. Third part was a big turnoff, specially because of all the 'Karma' gyan that Neo is subjected to early on in the movie by the Indian couple. That 'Karma' gyan was possibly the means to connect the virtual to the real world, but honestly, I wasn't watching Matrix for that. That was one of the factors that eventually led me to put Matrix-2, and 3 in the category of bad sequels. 

So why am I talking about it today? For the simple reason, that I fear that LOST may head the same way. Season 5 so far has been moving at a gripping pace. There's something sensational in every episode. The pieces are getting linked together. But one of the things thats repeatedly being pushed across is that idea that what has to happen, will happen, that there's something like destiny. The concept that you cannot go back in time and change something that has already happened seems like a genuine expectation: afterall, if you were allowed to do that, you wouldn't end up in the present that you see today, which would mean that in most probabilities, you wouldn't be going back to past to change it. Confusing ? It is. So the simple assumption that what has happened cannot be undone is a fair assumption to keep things simple. 

What worries me is how LOST is eventually going to handle the future and things that are going to happen. At this time, they keep coming back to the idea of something being pre-decidedeg: John Locke had to die. He has to lead the others...etc etc. Are they evetually going to conclude that there's something called Destiny and there's  a superpower? Otherwise, how will you justify the concept that there's a destiny, for if there's a destiny, there has to be writer for it too! 

I hope at the end of the day, there's an acceptable piece of sci-fi explanation to LOST. Otherwise, all the efforts that I have put in lately revisiting high-school physics and theory of relativity/time travel will go down the drain :(