Waverider

Waverider is Matthew Ryder from an altered timeline. In his own timeline Matthew lived under the rule of a dictator called the Monarch. Having been saved as a child by heroes Matthew became inspired by the superheroes of the past to fight back against Monarch. After discovering the villain used to be a hero Matthew built a time machine to travel back into the past to avert this timeline. Unlike other attempts by other travelers Matthew survived the ordeal. Although the process changed him by somehow merging him with the time streams' temporal energy. Physically changed Matthew dubbed himself Waverider. Eventually he came in contact with the Linear Men, who had just (depending on your linear POV) lost a member named Travis O'Connell. They asked Waverider to join their ranks.

Powers: Able to travel to any point in time by will. Waverider is also a seer that can see into a persons' future by touch alone. 

Waverider 2.0: In Zero Hour Waverider was killed by Extant, the evolved form of Monarch.Another Matthew Ryder was called upon to take on the role of Waverider in his place.

(Other) Deaths: During 52, time travelers were being hunted down by Mr. Mind and Waverider was unlucky enough to be discovered. Unable to reveal Rip Hunters' location (and boasting that Mind would never be able to outsmart Hunter) Waverider was murdered. According to the remaining Linear Men (New Earths' Matthew Ryder and Liri Lee), Rip Hunter argued with the group over Waveriders' paradoxical origins. They claim that he died during Infinite Crisis. How and why this differs from the events in 52 (which takes place during the year proceeding) are currently unknown.

First Appearance: Armageddon #1     

Supernova 2: Daniel Carter

Daniel Jon Carter was a high school football player who's future prospects in professional football were dashed after a knee injury. Stuck in a dead end job as a life insurance salesman Daniel longed for a taste of the glory he had as a player out in the field. When it appeared that the hero Booster Gold died he was stuck with the impulse to go to the mans' funeral even though they never met. While there he met Boosters' robot sidekick Skeets who discovered that Daniel was Michael Jon Carters' present day ancestor. Unconvinced of the connection Daniel was visited by Skeets to try and get his assistance in finding clues in Rip Hunters' bunker. Reluctant to help Skeets revealed that he read Daniels' day planner and knew of his ambitions in becoming a hero. The robot offered to help him become one instead of trusting in Lex Luthors' Everyman project. 

While investigating Hunters' Time Lab the villain Hunter was hiding from emerged to trap Daniel one of Rip Hunters' defenses: a Time Loop. He was stuck there until Rip Hunter recused him and asked for his further assistance to save the Multiverse. Not thrilled with the prospects Daniel agreed donning the Supernova suit Booster Gold had previous wore to help with the endeavor. As Supernova he was an important part of the plan to trap the villain. Eight weeks after the incident Daniel made no effort to become a full fledge superhero and was robbed of the suit by the Time Stealers. 

Daniel has met his future wife Rose Levin and used a second black version of the Supernova suit that Rip Hunter has invented from time to time. The suit seems to have the same powers as the first. 

First Appearance: 52 #18 as Supernova 52 #52