The year is 2035. 20 Years in the future. And a lot of things is different.
Superman hasn't appeared as much as he used to due to the fact that he became a father to twins John and Mia. He has since been succeeded by Superboy and Supergirl, becoming Superman & Superwoman. However, Superman 2 had to retire as well because he became a father as well, leaving Superwoman as a solo hero.
Martian Manhunter is as active as ever, but is more migrant, not really staying in the same place for long. His niece Miss Martian is married to Superman 2, each having to retire after having their son Ethan.
Wonder Woman is as active as Superman, due to becoming a mother to Lyta. Donna Troy has succeeded her as the new Wonder Woman. Wonder Girl has become the new Troia, but was a short lived career due to becoming a mother to Artemis.
Aquaman has totally isolated himself from civilization to rule atlantis like a true king due to Black Manta and Ocean Master incenting a civil war that would have killed the royal family. Garth has since become the new Aquaman, and Aquaman's son AJ is the new Aqualad, till he decides to become Tempest.
Flash has retired to take better care of his family. Wally West then became the new Flash, and Wally's daughter Iris is the new Kid Flash, and Barry Allen's grandson Bart has become Impulse
Hal Jordan is still Green Lantern to this day, but due to the destruction of Coast City, he felt so ashamed he vowed to never return to the earth. Guy Gardner, John Stewart, Kyle Rayner, and Simon Baz continue to protect the earth, but the aging of the human race forced them to retire.
Green Arrow and Black Canary finally had a son, Ian. Both have officially retired after that to raise their son. Oliver Queen chose to pass on all of his responsibilities to Connor Hawke. Roy Harper has now gotten his life in check and has retired from being a hero to be a father to his daughter Lian.
Dr. Fate eventually had to move on to the afterlife, and so he chose his next successor: Zatanna.
There are other lesser changes: Beast Boy and Raven had a daughter named Sabrina, and Cyborg as succeeded Steel as the new Steel.
Now Batman, he had the most changes. After Batman had his back broken saving Gotham from Bane and Scarecrow, he was forced to retire. But immediately after, there was infighting amongst the former and current Robins till Batman just decided to give the role to Jim Gordon, as an attempt to keep his pupils from each others throats. After that, it was found out Batman had two children, their mothers being Selina Kyle the Catwoman and Talia al Ghul: Damian and Helena. Both became heroic sidekicks to the other members of the Bat family, and Batman marries Catwoman due to Talia having impure intentions for her son. However, in 2020, Jim Gordon's career as Batman ended after an exposure to Poison Ivy's toxin caused him to have heart problems. Thus, there was more infighting, something which made Batgirl retire and marry Blue Beetle, having a son named Mickey. Jason Todd then tried to be Batman, but due to post traumatic stress of being tortured by the Joker when he was a child, he was the most brutal Batman in history. He was Batman for only a year before his recklessness got him beaten and nearly killed once again, this time at the hands of the League of Assassins. But instead of becoming more unstable, it gave to Jason clarity, giving to him the resolve to retire. Thus the order changes: Dick Grayson becomes Batman, Tim Drake becomes Nightwing, Cassandra Cain becomes Batwoman, and a girl named Carrie Kelley becomes Robin. Dick's tenure as Batman was long, but it ended in 2030, when an assassin shot him in the neck, causing him to have to be bed bound for a while, and he officially retired after marrying Starfire and having a daughter named Mar'i. Tim Drake became the next Batman, with Damian becoming Nightwing, and Carrie becoming his girlfriend and Catwoman. Tim had to retire after marrying Cassie Sandsmark and having a daughter named Artemis. Damian finally got the chance to be Batman, and married Carrie, and they had a son named Vincent.
But the newest to come is the Batman that debuts in 2050: Terry McGinnis, Batman Beyond.
The All New Justice League
Superwoman-Kara Kent
Superboy-Ethan Kent
Supergirl-Mia Kent
Martian Manhunter-John Jones
Wonder Woman-Donna Troy
Fury-Lyta Trevor
Darkstar-Artemis Drake
Aquaman-Garth
Tempest-AJ Curry
Flash-Wally West
Kid Flash-Iris West
Impulse-Bart Allen
Green Arrow-Connor Hawke
Black Canary-Lian Harper
Arsenal-Ian Queen
Dr. Fate-Zatanna Zatara
Steel-Vic Stone
Jinx-Sabrina Logan
Huntress-Helena Wayne
Question-Mickey Reyes
Batwoman-Cassandra Cain
Nightstar-Mar'i Grayson
Red Robin-Vincent Wayne