This DC: The Dark Side line is by Eon.

The Son of a Bat gang leader was made from an Austin Powers Scott Evil with a Spawn Al Simmons head. Gun from Trigun.

Joker's corpse diorama, base off of the final page of "Hunt the Dark Knight", was constructed out of another Austin Powers figure.

Joker in his prison uniform was a Dr. Evil with a modified Toybiz Magneto head and right arm.

Rorschach from 'Watchmen' was a MAC Angel figure with a Spawn V head and a GA Sandman hat.