I'm doing two. Because I'm indecisive.

Sam/Dean (possibly Sam/Brady?). I LOVE Stanford stories, there aren't enough of them. It's probably AU but you know I love me some protective!Dean. It can be something dramatic like an alternate events to your Sam/Brady fic. Brady roofies Sam and attempts to rape him. Dean's there for some reason and saves Sam. AND/OR. Sam's at Stanford and doesn't think he'll ever be redeemed in the eyes of his family for leaving. He gets involved in a hunt for some reason, maybe to test himself--to see if he really even belongs at Stanfod, if he belongs ANYWHERE. He's successful but gets hurt and he comes to Stanford injured. Brady, not a close friend yet (possibly not possessed yet), takes care of him and Sam thinks of all the ways Brady's not Dean and...it makes him feel good/makes him feel emo and angsty.

Sam/Gabriel. Sam dies for the last time (either the wall breaks or it's later in life). Gabriel's there to welcome his lover home and wrap him in his wings.

Sorry. Long. Does that help at all? XD