During an accident as a child Vera lost both her arms past her elbows. When she was a child, her parents would often fight, so her brother would take her out to play. As his psychic powers developed, this 'play' would develop into killing sprees. This twisted Vera in later life. When her brother died after attempting to destroy Superman, Vera tried to get revenge. She underwent cybernetic enhancement, replacing her arms with cybernetic versions that could turn into any weapon she wanted, and went on with her misguided mission of revenge.
She became aware that the Planet Earth, in a reflex response to all the strife it endures, was going to destroy human life. Vera and the JLA devised a plan in which she would lead a reformed The Elite (right) in one last battle in a bid to scare the United Nations into cooperation by having all the armies of the earth unite against the Elite. The ruse worked, and the Earth did not follow through.
The JLA, mainly on the encouragement of the Flash, asked her to lead the new team permanently, handling black ops that the JLA couldn't. She brought together members of The Elite, Coldcast and Menagerie, with some Justice League members, Flash, Manitou Raven, Major Disaster, Green Arrow and Kasumi, and added the spy Naif al-Sheikh. Somewhere along the way, Vera began showing signs of madness. Eventually, it came to light that she was haunted by the spirit of her dead brother (who was a powerful telepath in life and had hid in the dark corner of her mind after his death), working through the mental problems she got from playing with him as a child. He tormented her, stole her body and proceeded to destroy London. Her teammates in the Elite helped her see that she was better than her brother, and she overcame him, and prevented the outright destruction of the city.
Presumably, she is still leading the Elite, as several members of the team were shown as still being together under her at the end of this battle.