Sam may not be able to see the ghost, but he's ready for anything. It looks like a tough battle this go around, but we all know the Winchester brothers will be able to handle this. C'mon! It's Sam and Dean!
Castiel looks like he's about to throw down with Metatron. However, the scribe seems pretty eager to make one last request or deal. Or is he just wondering if Castiel wants to take him out for waffles again?