Swamp Thing And Sandman

At Least Four Ways In Which The Sandman Follows On From Swamp Thing

(i) Cain and Abel appeared in Genesis, then hosted DC horror comics, then appeared in Alan Moore's Swamp Thing, then in The Sandman. Thus, although they did not originate in Swamp Thing, I think that their appearance in The Sandman follows directly from their roles in Swamp Thing.

(ii) John Constantine originated in Moore's Swamp Thing, then starred in The Sandman no 3, where he refers to the Swamp Thing as "...the big green bloke..." (Neil Gaiman, Preludes And Nocturnes, New York, p. 89).

(iii) In The Sandman no 4, Lucifer refers to the Swamp Thing/Crisis Crossover when:

"...the Dark, the shadow creature, came forth to challenge Heaven." (p. 116)

(Since the Dark, as Lucifer calls it, was in fact the Original Darkness That Was Before The Creation, I do not think that it is accurate to refer to it either as a "shadow" or as a "creature.")

(iv) The Bogeyman did not attend the Serial Killers' Convention in The Sandman because the Swamp Thing had killed him three years before. The Family Man did not attend because he was fighting Constantine in John Constantine: Hellblazer. The Corinthian, a nightmare who had escaped from the Dreaming during Morpheus' captivity and then inspired serial killers, did attend.