So there's been a lot of people analysing the S15 official poster. One of my firts thoughts was that it looked like a tarot card - the four of swords. Team free Will represents the swords, and the Impala is the knight usually shown lying down on the card. The four of swords card usually represents taking a break from the fight (or from work or whatever) They'll be peace when you are done. it seems to fit.
A lot of fans speculated that the card contians clues to the shows end. Which yeah, nah. Firstly i dont think they would entrust a graphic designer with that info! and secondly when you examine it, its pretty much like they fed a whole lot of SPN related symbols into a poster generator!
Lets take the tagline "As it is written, so it shall end". Well yes. No disputing that whether it refers to Chuck or the real world writers. But does it preclude our chacrters "writing" their own ending? I think not.
What other symbols do we have ?
Black wings - is that Castiel speciifcally, or maybe just angels in general? The rise of Mciahel maybe?
Over the wings is an eight pointed star. In Judeo-Christian tradition this is associated with "beginings resurrection and salvation." It is set against something that looks vaguely like the Seal of Solomon or devil's trap, possibly with enochican script on it.
We have below it the Impala surrounded by fire, representing I assume, hellfire?
There are two angels with staffs (that look a little in the style maybe of Russian religious art) pointing towards what is a Stairway to Heaven. Does this indicate our chacrters ascent to heaven? Or that the show got a budget increase and can now afford the classical Zeppelin track?
Strangely at the top of the stair way is an anti-possession symbol. And there are birds (doves?) flying out from it. mmmm.
So - idk. I dont see any coherent symbology. But hey, lets come back at the end of the season and look at it again! Love to hear your thoughts and ideas in the comments!