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     

Linear Men

When he was a young boy Matthew Ryder was saved from a subway cave in by a time traveling hero named Waverider. An experience that would give Matthew a strong admiration for superheroes of the 20th century. A few days after his recuse the boy and his parents watched as Superman and the Metal Men attempted to move an unstable generator. Realizing that this was the event that would trigger an explosion that would kill the boys' (actually Waveriders' past self) parents Waverider transported the generator out of time. Although he succeeded in saving the Ryder family he found that he could not alter his own past. Thanks to the nature of his change into Waverider his own existence was not disrupted. As a result the version of Matthew Ryder he had saved did not become Waverider in the altered timeline but co-existed with him as the leader of the Linear Men. This version devoted his life to his passion in time travel forming a group in an attempt to protect the timeline from outside forces. They set up their base in an outpost at the end of time called the Vanishing Point. 

As the post-crisis means of time travel were severally limited the group had to frequently replace their human parts for machine replacements in order to survive. Ryders' team was comprised of archivist Liri Lee (his wife), a cyborg version of Rip Hunter, Travis O'Connell and later Waverider himself. O'Connells' last mission was to bring hero Booster Gold back to his point of origin but was intercepted by Superman who was mistakenly sent into the timestream during their struggle. Eventually O'Connell sacrificed his life during a confrontation with Superman in the 30 century. When Superman questioned the Linear Mens' methods and O'Connells' mission to return Booster to the 25th century the Linear Men claimed their teammates' actions went against their own. Hunter stating that although Booster didn't know it he was essential to the evolution of man and needed to stay in the past. At some point the Linear Men expanded their organization to become leaders of a force of temporal time enforcers called the Linear Authority.

Different Timelines?: The Linear Men have gone through a few changes over the years. In The Kingdom, a tie in from the main DCU timeline into the popular Kingdom Come series, Rip Hunter rebelled against his teammates to help the heroes and protect an aspect of time he had discovered called Hypertime. In Superman The Man of Steel #118 all the remaining Linear Men save Liri Lee were reduced to brains that communicated telepathically. (Yeah, I don't get it either.) Deemed insane all of them given new lives. 

Where are they now?: In the new Earth established after Infinite Crisis it isn't clear how much the Linear Men have been altered. Waverider was apparently murdered in the 52 series while refusing to give any information on Rip Hunter (he claimed he didn't know much anyway.) The cyborg version of Rip Hunter hasn't been seen and according to Black Beetle only Matthew Ryder and Liri Lee remain. They were said to have been locked away in a cell at Vanishing Point by Hunter for disagreements over the existence of people who should not or will not exist. This seems to go against past characterizations of Rip Hunter but given the speaker of such accusations it's likely that this is stretching the truth.

First Appearance: Adventures of Superman #476

Lena Luthor

Lex Luthor never expected his marriage to the mysterious Contessa Erica Del Portenza would give him the one greatest joy he never experienced: fatherhood. Taking advantage of his wifes' wishes to be unconscious during the birth Luthor tried to keep her in a coma and raise their daughter on his own. Named after his foster sister Lena Thorul, Lena represented the best of Luthor. Although he claimed to love her above all else (save himself) he traded the girl in a bargin with Brainaic to gain power. Playing it off as if he didn't care in front of Superman, privately Luthor regretted his actions.

More so when Brainaic 13 returned from the future with an apparently adult Lena by his side. She eventually sided with her father and was returned to her infant age though Superman hesitated in returning her after Luthors' previous actions. The girl has had a few hints at having a greater destiny although this was never fully explored. An assassin sent from the future to kill Luthor was startled to discover the man had a daughter as she had never been mentioned in the history books. Lena was last seen in the care of her new nanny, who unbeknown to Luthor was Linear Man Liri Lee.

Where is she now?: Unknown. New Earths' history has been altered thus it's uncertain if Lena still exists. Lex Luthor no longer has a foster sister but a biological sister of the same name.

Family connections: Her mother the Contessa is in fact an immortal/magic user that's lived through ancient Rome. Her linage inherits this gift, as her son from a previous marriage Luca shares such a long existence. Luca is a murderer who kills those he believes deserve to die. 

On her fathers' side she has a invalid aunt of the same name and a cousin named Lori. Thanks to a cloning experiment her father conducted with Superman and his own DNA Superboy Connor Kent, is also part of her family tree. 

First Appearance : Superman #131