DC One Million
In the 853rd century, the progenitor of the Superman Dynasty, Superman-Prime, is about to return from his solar Fortress of Solitude after several centuries. As part of the festivities, the Justice Legion Alpha went back in time to recruit the ancient Justice League of America. The current Legion had counter parts to the League except for Green Lantern (they had the future Starman instead). After arriving at the end of the 20th century, Kal Kent and the Justice Legion convinced the League to go the future and participate in trials as part of the celebration.
Following the Leagues departure, Hourman releases the "Hourman virus" which infected not only people, but technology. It is revealed that the virus is Solaris' artificial intelligence in its infancy. The virus is spreading because Solaris is looking in all technology and organisms for its body. To cure the world and save it from Solaris, they had to create Solaris. Once in his body, Solaris became self aware, with his intelligence increasing with every passing second. Starman sacrifices himself but he is able to banish Solaris by creating a black hole. Their time machine didn't have enough power for deep time travel, but Superman is able to punch through the time barrier to bring the Legion back to the 853rd century. They arrive in time for Superman-Prime's arrival and the final destruction of Solaris.
All Star Superman
Grant Morrison returned to DC Comics after a lengthy stint on New X-Men. His first projects were We3 and the Seven Soldiers of Victory series. In 2005, DC Comics announced All Star Superman would be written by Morrison and illustrated by Frank Quitely. The premise is a universal Superman who isn't bogged down by continuity, but had the best elements of the mythos plucked from each era of Superman history. Morrison plans to use aborted plans from the "Superman 2000" pitch and would expand previous plot lines including DC One Million and Solaris.
Kal Kent isn't actually named until Superman mentions him by name in All Star Superman #2. He is shown in holographic form detailing the Superman Dynasty's feud with Solaris. He makes his first appearance leading a group of Superman Squad members against the Chronovore in Smallville the day Jonathan Kent died.
Powers and abilities
Kal Kent has Kryptonian powers that have evolved into the far future. He also has super ESP, force vision, telepathy and 10 senses. Kal gets his powers from Superman-Prime and Earth's Super-Sun. Although humans have developed into a superhuman race as well, Superman-Prime promised his successors greater powers if they pledged to always protect Earth and the solar system.