Warning: SPOILERS for Avengers Forever #10
Marvel's Iron Man has many flaws, but he ultimately is a good person - but in most universes, he's utterly irredeemable. The Armored Avenger, like every other character in the Marvel Universe, has a nigh-infinite amount of Iron Man variants, each living in a parallel universe across the Marvel Multiverse. In Avengers Forever #10, the company reveals that Iron Man - in his default state - is selfish, corrupt, and broken beyond repair.
In the new Avengers Forever series, Tony Stark (the Ant-Man) is the leader of a band of superheroes fighting against the Black Skull and his army. Threatening to take over the multiverse, the Black Skull must be stopped - but he must be stopped by a team of the mightiest Avengers that Ant-Man can find. Along with Deathlok and the Ghost Rider, Ant-Man recruits a Thor with the powers of the Iron Fist, Black Panther with a multitude of powers (echoing Star-Lord and Spider-Man), a squad of Captain Americas and the Captain Marvel Corps: a group of Carol Danvers variants with their own Helicarrier. The only Avenger left to recruit is Iron Man.
But in Avengers Forever #10, written by Jason Aaron, Jim Tower & Guru-eFX, the multiversal Avengers find one awful Tony Stark after another. They are self-destructive, selfish, and present a danger to themselves and to others. The first Iron Man that Ant-Man meets dies after he flies into a mountain while drunk, and the others are even worse: one Iron Man transplants his mind into a Galactus robot the size of a planet (and consumes other planets as well), and another is too paranoid to even leave his cave until his Iron Man armor is "perfect".
Iron Man Is A Danger To Himself And To Others
It must also be noted that none of these Iron Men are superheroes; they put themselves first before any other innocent lives. While not quite "evil" Iron Men (unlike Superior Iron Man, for example), the Tony Starks of the multiverse desperately need help. Ant-Man eventually creates a Tony Starks Anonymous group to help his multiversal selves, but there are an infinite number of Starks in the multiverse, and a heroic Iron Man is the exception rather than the rule.
Consider the many opportunities in the 616 universe during which Iron Man could have turned evil or isolated himself. The Demon in a Bottle storyline nearly ended with Tony's death; the Civil War event that ended with the assassination of Captain America taught Tony the evil of his ways, and he sought help on both occasions. While Iron Man is a hero for saving others, he is also a hero for overcoming his most dangerous inner demons; these multiversal Iron Man, sadly, could not make up for the sins of their pasts and paid for them dearly.