Taking advantage of the original five X-Men's absence in the past, the Future Brotherhood went back in time to impersonate them, intending to reshape the future as they saw fit. After trapping Professor X within his own mansion, the Future Brotherhood killed Magneto and his Brotherhood of Evil Mutants before setting out to enslave all mutants. Xavier managed to reach out to some mutants and encouraged them to fight, but their X-Resistance was no match for the Future Brotherhood.
At some point, the Future Brotherhood also time-traveled to the year 2099 of this timeline and took over the megacorporation Alchemax. Before vanishing, they established policies for Alchemax to work on: to hunt and persecute anyone who got in their way. Those unlucky enough to do so were infected by a new strain of the Legacy Virus and forced to live in poverty. The X-Men of 2099 fought against Alchemax and their private police force, the Public Eye, in order to provide medicine for these people.
When the Future Brotherhood struck, Xavier left a telepathic message that jumped from person to person until it reached Magneto in the present day. Before ceasing to exist due to the ripple effects caused by the Future Brotherhood's actions in the past, Magneto telepathically instructed the time-displaced original X-Men to use the time machine he had built to fix the timestream. Hopping from a point in history to the other, the original X-Men eventually made their way back to their past, making many allies along the way. They saved past Magneto from death and confronted the Future Brotherhood, overwhelming them with the help of their newfound allies.
Most of the damage the Future Brotherhood caused to the timeline was undone when they escaped back to the timestream, with the rest being undone after the original X-Men returned to their proper place in time, thus diverging the events of this timeline from Earth-616.
- Public Eye
- Brotherhood of Evil Mutants
- Generation X
- Theatre of Pain
- Unus the Untouchable (Gunther Bain)
- X-Men (2099)
- Captain Britain (Brian Braddock)
- Cannonball (Sam Guthrie)
- Nightcrawler (Kurt Wagner)
- Colossus (Piotr Rasputin)
- Polaris (Lorna Dane) (deceased)
- Storm (Ororo Munroe) (deceased)
- Warpath (James Proudstar) (deceased)
- Havok (Alex Summers) (deceased)
- Kitty Pryde (deceased)
- Strong Guy (Guido Carosella) (deceased)
- Fantomex (Charlie Cluster-7) (deceased)
- 7 appearance(s) of Earth-TRN657
- 1 mention(s) of Earth-TRN657
- 66 image(s) of Earth-TRN657
- 30 characters that originate from Earth-TRN657
- 4 teams that originate from Earth-TRN657
- 2 organizations that originate from Earth-TRN657