I bet Castiel would have insisted on wearing the big poofy gown. No Cas, for the last time. You are not wearing a wedding gown! But Dean! That's what all of the magazines say makes for the perfect wedding! You may now kiss the bride.
Imagine if we got a scene similar to this in a sneak peek and it would be like the last two seconds before they finally kiss and crowley would be like : jeeez guys finally, wait what? Wow guys get a room !