User blog comment:Bakublader1/Mal as Guardian?/@comment-5458789-20121220174952/@comment-1038387-20130116081754

Yes, but that Vulcan was originally a Charlton asset. He was the champion of the Roman gods. He stayed in limbo until the Son of Vulcan used him again, fighting a bunch of White Martians (not really "keeping them in check" - that's J'onn's job more than anyone else). Doubtful that played a role for Black vulcan, though.