Iron Man 2020 (Arno Stark)Created by Tom DeFalco & Herb Trimpe (Machine Man Vol 2 #12)
Arno Stark was originally introduced as a descendant of Tony, and the Iron Man of 2020. He was a more ruthless and occasionally villainous Iron Man than his predecessor, but eventually turned to the side of angels and joined the interdimensional team The Heralds, dedicated to warning parallel Earths about the danger posed by The Celestials.
The original Arno Stark debuted in 1984, when an Iron Man of the year 2020 seemed far-fetched and futuristic. However, with 2020 only a few years away, a modern day Arno was introduced as the genetic child of Howard and Maria Stark, following the discovery that Tony was adopted.
Arno was modified in the womb, first by the Recorder-451, and then later by his father Howard, in an effort to counteract the prior meddling. As a result, Arno’s health quickly degenerated, and he was hidden by his parents to prevent 451 from ever finding him. Once Tony discovered his brother’s existence, they worked together to create the city of Troy from the ruins of Mandarin City in China. Using an Iron Man-like armor, Arno was able to walk and move as if he were healthy.
When Troy came under attack by The Rings of the Mandarin, Arno defended it in a Hulkbuster-style Iron Man suit, which had the trademark Iron Man 2020 gear design on the shoulders. Arno Stark hasn’t appeared in comics for a while, and in one of his last appearances he and his brother fell out over Arno’s intention to remake Extremis.
2020 is just four years away though...