Must admit, I sort of laughed my ass off, while flailing, when I caught the sneak peep a few days ago.
I mean - we knew that this plotline was in the works, so in terms of wince wince wince there was nothing new, afaic, but in terms of Holy Crap, This Is The Slashiest Thing Ever including bonus and utterly unexpected Dean slashing Sesame Street Characters (Yes, Dean is now officially, canonically a slasher) I did rather a lot of flailing.
I think this has the potential to be absolutely spork-in-the-eyeball ghastly, but I'm working on the assumption that it will all be fine.
Also, I do love Misha's delivery.
And, seriously - trying NOT to read Castiel's sudden awkwardness as slashadelic, when he's just shown up at Dean's place with a tub of oil and the intention of spending the last night of his life with Dean, for whom he got himself killed and gave up everything he loved, valued and believed in...well, I don't know how NOT to see that as slashtastic. I have no idea. I mean, even if Castiel were to go and shag some chick - which, good lord, the prospect of the angel casually going to a prostitute for sex just horrifies me on so many levels, because it's belittling and demeaning to both parties - well, even then, I would still totally see it as All About Dean. And I don't even mean that in a wants-to-jump-Dean's-bones way (neccesarily). Just in a following-Dean-like-a-hopelessly-besotted-puppy way.
But I'm assuming that Something Else Will Occur.