I love this collection of shots. And would like to add that I think the exit sign next to Sam in season 11 is indeed one of many potential instances of the foreshadowing of his death at the (near) end of this season. I also think that with Death’s demise, the exit signs might not be as straightforward as they have been.
As @lost-shoe and @dustydreamsanddirtyscars have said, it might be more a case of an indication of the death of co-dependence and not of an actual death, as – for all of Billie ’s threats- the Winchesters will live (unless this does turn out to be the final season, then all bets are off)
Also the fact that a lot of characters are framed with them could be indicative of a threat of the end of the world as we know it, given Amara is hell – bent on destroying God’s work, in which case everyone would die.
I also think that with Death’s demise, the exit signs might not be as straightforward as they have been.
Yeah, I was kinda wondering that myself. It wouldn’t be the first time a visual motif in SPN started off foreshadowing plot points for specific characters morphed into something indicating more general portents.
So, it may be more significant that an exit sign is lurking behind a human, in general, rather than Sam in particular. That would bring the 3 axis of Heaven, Hell, and Earth into parallel.