Holocaust - DC Comics - was created in 1993.
"Holocaust" is a character created by Jim Lee and Brandon Choi, first appearing in "WildC.A.T.s" #10 in 1993, published by Image Comics. It is not a character within the DC Comics universe.
Mantis - DC Comics - was created in 1971.
Non - DC Comics - was created in 2007.
Alliance - DC Comics - was created in 2002.
Ares - DC Comics - was created in 1942.
Ronin - DC Comics - was created in 1983.
Guardian - DC Comics - was created in 1942.
Mask - DC Comics - was created in 1947.
Epoch - DC Comics - was created in 1962.
Spellbinder - DC Comics - was created in 1966.
Hades - DC Comics - was created in 1987.
Effigy - DC Comics - was created in 1999.
Merlyn - DC Comics - was created in 1971.