Imagine Carry On Wayward Son being at the end of the episode instead of the beginning of the last episode. Imagine Cas, Sam, and Dean broken, having defeated Hell and all the angels in Heaven. That at the very end that music begins to play for the last five minutes and you know that it's ending. And you sing along to it like you always have. And in it's last moments you hear, "There'll be peace when you are done. Lay your weary head to rest. Don't you cry no more." And you know that wether they live or die that they will finally, finally be at peace. And that Sam and Dean won't have to die anymore and neither one of them will have to give away pieces of their souls to bring the other back.