User blog comment:ImperiexSeed/Sam's NOT the hero of the show!/@comment-3481504-20160104193949/@comment-3423279-20160104234335

So Michael was lying about Dean being his vessel then?

Raphael said that they were tired and wanted the paradise that would occur after the apocalypse, they would not stop just because Sam wasn't born, Dean would be thrown into Hell once he died to break the first seal and revived to serve as Michael's vessel during the final battle, so you are correct in that seasons 6-11 wouldn't happen but not due to Sam not existing but because the world would've ended.