Black Mars

In the wake of Apollo Geist's defeat, it was originally planned to introduce a new G.O.D. executive named Black Mars (ブラックマルス). However, the unforseen popularity of Apollo Geist changed the course of the series and this character was scrapped.

Etymology
Mirroring Apollo Geist himself as well as the Shinwakaijin,  is the name of the Roman god of war and counterpart to the Greek god.