Captain Atom
From Superdickery
A DC superhero, bought from now dead comic house Charlton. Real name Nathaniel Adam. Was introduced into the main DCU with Crisis on Infinite Earths, along with the other Charlton characters. Absorbs and shoots energy, flies.
He led the Justice League Europe until the train wreck Armageddon 2001. Armageddon 2001 was all about a possible future where a hero goes mad in the year 2001 and kills all the other heroes, to rule the world as a tyrant named Monarch. It was set up like a mystery, where Waverider, a new hero from Monarch's future goes back in time and looks at the heroes' futures would appear in a lot of annuals during 1991, and try to determine who is Monarch, stop him and prevent the future from happening. However, the super-secret ending leaked - it was Captain Atom. Everything up to the last 30 pages had suggested that Captain Atom was the one, but DC decided to be pig-headed and change the ending - Hawk of Hawk and Dove really was Monarch. This made no sense at all, and DC pulled an ending where Captain Atom sacrifices himself to teleport Monarch away out of their ass, probably because they had to get rid of Captain Atom somehow. He returned not so long after.
Then he sacrificed himself in Superman/Batman, and went to the Wildstorm universe. He then blew that up and returned to the main DCU during Infinite Crisis.
Recently, he has decided to be Monarch anyway and dons the armor (Hawk wasn't using it since he got timepwned and blown up in JSA). Lol, make up your mind already! Last seen assembling a huge army in The Bleed to fight the Monitors.