User blog comment:Fusedtwilight/SEASON 8!!!!!!/@comment-4011543-20120603154922/@comment-3481504-20120616164812

Well, no. He intervened, and helped Dean and Sam escape Lucifer's ascension. He cleared or "flushed" Sam out, and granted both of them salvation in Heaven. He's resurrected Castiel at least twice.

And, plus he already appeared in the flesh, as Chuck, unbeknownst to everyone, except probably Death.