So it's all about the bloodline, yeah? Well...

I am totally and utterly LOVING season five of Supernatural. The show just seems to get better and better with every new set of episodes and I am torn between wanting to burst with anticipation of the season finale and not wanting it to ever end.
Having said that, the news that The CW has confirmed a sixth season brightened up my day no end yesterday and was a fab little ray of light amongst my poorly self-pity.
The last couple of episodes of the new season have got me thinking though. Mainly The Song Remains The Same, something Michael said about it all being about the blood.
And I have a vague theory about what might happen at the end of this season, which the creator did say had been written to wrap up the Apocalypse story arc but also not rule out a possible sixth season.
Here we go.
There has been so much made of the apparent fact that Sam and Dean have a destiny to fulfill and no matter what choices they make to try and change that, they will only ever head closer towards the inevitable - Sam saying yes to Lucifer and Dean forced to say yes to Michael.
But I had a thought, sparked by the editorial on Buddy TV about the episode, where the writer seemingly has the same suspicion I did about the splash of blood across the screen during the opening credits - blood or bloodlines were going to be the most important thing in the final resolution.
So if Dean and Sam's very existence, their bloodline stemming from Cain and Able themselves all those millennia ago, and destiny really is written, they clearly have no choice but to accept their fates?
Or do they?
Because I was suddenly hit by an idea that I really can't shake off.
If it is in the very blood of Dean Winchester to be the Archangel Michael's vessel, passed down through generations, then is it not also in Sam's?
Do Sam and Dean not have exactly the same parents, grandparents, great-granparents and however much further back you want to go?
Therefore, does it not stand to reason that SAM could also be a vessel for MICHAEL and DEAN a vessel for LUCIFER?
If the main reason that Sam has to be Lucifer's vessel is because the Devil knows that Dean could never kill his baby brother, I have a strong suspicion that our Winchester boys might turn the tables on their puppet masters.
Oh I believe the final, apocalyptic battle will take place. I struggle to see what else can happen unless God suddenly swoops on in and saves the day - which would be a pretty crappy way to end things.
No, I think that Sam might say yes to Michael and Dean say yes to Lucifer, giving Team Free Will a say in how things turn out after all.
One thing which which I found apparent as each season of Supernatural has progressed is that, while Dean is the stronger, more ruthless individual on the surface, it is actually Sam who is the stronger brother overall.
While reluctant, he doesn't have the in-bred doctrine to protect his brother the way Dean does. It has always been about Dean having to take care of Sammy, something he had done without question or complaint ever since they were kids.
But I truly believe that, while undoubtably one of the good guys, there is something in Sam which means that he could, ultimately, kill his big brother if the very fate of the world depended on it. He could do what Dean couldn't.
Therefore, if Sam said yes to Michael, leaving Lucifer no other option but to take Dean as a vessel as the only one left with the special bloodline, I believe Sam would be prepared to kill his brother to destroy the Devil, however much it might destroy him to do so.
I could be completely wrong, of course, and chances are I probably will be as that Mr Eric Kripke always seems to keep the viewers in the dark right until the last minute.
Of course, whatever happens, now we know our boys will be back in 2010 at least means they can't kill them off permanently. Or so I hope!