MAJOR DARK NIGHTS THE METAL SPOILER AHEAD READ AT YOUR OWN RISK
Have you ever read Sandman you really need to give it read some time one of the best gothic Supernatural comics ever and no I don’t mean from the tv show. Morpheus also know as DREAM is one of the super powers mystical God’s of the DC Universe. He fought many a great nightmare creatures trying to steal his power. The writing was so amazing by Neil Gaiman with a rotating cast of artists. Once during Grant Morrison run on JLA he appeared in the book but that was his successor Daniel. Death his sister would appear to Lex Luther in 2011. As readers of The Sandman may recall, Dream is actually Daniel Hall, the successor to Morpheus, the original star of that series
It had been asked several times if Vertigo titles had appeared in DC regular continuity and with what happened in DC Rebirth #1 last year and Superman Reborn and Batman/Flash The Button a few months ago with Dr.Manhatten and the Watchmen it seems as Vertigo universe is bleeding they to ours. Now with the last page of the Metal #1 revealing Dream of The Endless it seems the rebirth is mergering it or it always has been when Manhattan formed the new 52 6 years ago.
I recommend picking up The Sandman Overture by Gaiman and JH Williams III and Dave Stewart as well as Sandman vol 1-10 of the original Vertigo 90s series.