User blog comment:Kajune/Lucifer, first son?/@comment-3068419-20160413231453/@comment-79.115.76.64-20160414114858

I don t think that the writers can make a mistake like that. I mean season 5 ( best season in my opinion ) was all about Sam and Dean beiing the vessels of Lucifer and Michael . Michael (older brother like Dean ) and Lucifer ( younger Brother like Sam ). That was a huge deal. Little mistake yes can do, but they can t undo what season 5 was about