In many of Marvel's alternate worlds, Cable is one of Marvel's most powerful potential figures, with his psionic abilities have the possibility to change the fate of the entire world if used properly. One version of him from across the multiverse even figured out how to use them to save his entire world from itself.
Now, we're taking a closer look at Brother Nathan, the messiah-esque version of Cable who Deadpool encounters during a reality-hopping adventure in Fabian Nicieza, Patrick Zircher and Udon's Cable and Deadpool #16 in 2005 and how he proves that there was a better path for Nate Grey than to set off the Age of X-Man.
After fighting against a threat known as Skornn, Cable is subsequently lost in the multiverse. Deadpool, Cannonball, and Siryn ventured into the multiverse to try and find Cable. Deadpool uses the connection created between them to follow after his unlikely friend while the former X-Force recruits use a Forge-constructed device to follow Deadpool. After barely surviving a dark world where Cable had been transformed into one of the Horsemen of the Apocalypse, Deadpool found himself in an ideal version of the Marvel Universe. There seemed to be peace amongst the human and mutant populace there, with no violence left on the planet. The people are protected by robotic devices that can eliminate weapons as soon as they are detected, with the populace being largely unaware of what weapons even look like anymore.
Deadpool finds himself confronting Brother Nathan, this world's version of Cable, who was able to bring peace to the entire world. He's eliminated war, hunger, conflict and prejudice from humanity and has effectively created a paradise on Earth. Unity is connected through a telepathic exploration of the human mind, suggesting that Cable's powers opened up telepathy to everyone in the world. Deadpool decides he doesn't fit in this utopia world and, as soon as he confirms Siryn and Cannonball survived the Age of Apocalypse they encountered, teleports to another reality.
This reality is surprisingly similar to the one created by another version of Cable -- Nate Grey, the version of the character created in the Age of Apocalypse universe. Nate ended up in the core-Marvel Universe as his home reality fell into conflict and tried repeatedly to bring peace to the planet. The events of Age of X-Man were his most recent attempt, resulting in him creating a quiet paradise reality and dragging the X-Men into it to see what a world that had fully embraced and accepted mutants looked like. However, his attempts to control the situation by eliminating any possible conflict ended up setting off some X-Men -- resulting in them fighting back and gaining their freedom by exposing the inherent flaws in Nate's designs, and that peace cannot be forced -- it must be embraced.
Brother Nathan proves there was a way that Nate could have succeeded in bringing the Age of X-Man to the core-Marvel Universe. Instead of creating a world where he could control the empathy of the mutants, Nate could have taken a page from Brother Nathan's book and instead just gave humanity and mutants access to one another with his telepathy. By trusting the people he wanted to save instead of just deciding he knew best, Nate could have opened up his impressive psionic powers and become the Earth-616 version of Brother Nathan. Instead, he ended up trapping the X-Men in a gilded cage that none of them actually cared for. Brother Nathan proves that peace could come to the Marvel Universe through his telepathy-backed empathy, and it's a shame that the X-Men didn't have the confidence to try something similar.