User blog comment:Gabrielaaloo/Archangel Michael/@comment-79.115.75.253-20180523104216

He can fix heaven if he want to do that

99% yes

I doubt t, he want to rule not to save the world

Depens of the writers, in season 5 Raphael stated that Lucifer can bring back dead angels , but Cosmic Entity said that only him can do that ( and if that is true that means that God rebuild Castiel every time )