Doctor Nemesis is a "self-evolved" mutant super-scientist, co-creator of the original Human Torch, and a former Nazi hunter. He lives on the nation-state of Krakoa.
Featured in these Comics
History
James Bradley was born on December 1st, 1906 in San Francisco, where his mother Catherine Price died during childbirth. His father, Dr. Nicola Bradley, created a power source for the first sentinel, and was impaled during it's subsequent rampage. He was presumably raised by his maternal grandparents, John and Mary Price.
During WWII, Dr. James Bradley worked with the late Phineas Horton, in the creation of the Human Torch, aka Jim Hammond. The two ultimately parted ways and James struck out on his own, taking an unfinished android prototype they created with him. Bradley activated the android and told him that he was Guy Newton, a young inventor who came up with the way to generate electricity in his body. Taking his word for it, the android began adventuring as a costumed hero named Volton. Needing to earn money, Bradley became a doctor at Mercy Hospital in New York City. Somewhere along the way, he decided to become a superhero. Wearing a surgeon's mask and armed with a hypodermic needle gun of his own design, he fought crime as Doctor Nemesis.
When Hope projected blasts of energy again, with the form of the Phoenix, Nemesis was the one to confirm to Cyclops that that energy was a signal, and that people would notice it.
During the Avengers/X-Men conflict, Doctor Nemesis stood among his kind, battling Iron Man after having taken down Quicksilver. He regrouped to the X-Diaspora after Utopia's battle.
As Hope created a device to make herself appear to telepaths at five different locations, Nemesis was sent to Wakanda along with Rachel Summers, Magma, Danger and Storm. He was shot with Black Widow's neurotoxin dart, making him delirious and incapacitated for a time. He participated in the tracking of Hope and the Avengers along the Phoenix Five, fighting in the Arctic Circle.
When the X-Men turned over the Phoenix Five and joined the Avengers, Bradley was among them, but wasn't seen during the final brawl. At the end of the conflict, he postulated to join the faculty staff of the Jean Grey School For Higher Learning, but wasn't selected by Kitty Pryde.
He then retired into a well-guarded laboratory to perform science on his own, until Cable came to him, suffering from the depletion of his telepathic powers, and recruited him into his X-Force, banding with Domino, Hope, and especially Forge, in order to help Cable.
Doctor Nemesis was of the many mutants that joined the mutant nation of Krakoa upon its creation. He was seen alongside many other Krakoans grieving Charles Xavier dead at the hands of anti-mutant super-human criminals that had infiltrated Krakoa and killed many of its residents, including Xavier.