The MCU's Armor Wars series can make Iron Man a villain one final time. Marvel Studios' inaugural character has one of the greatest multi-year arcs in modern cinema. In the 11 years that Tony Stark was in the MCU, he made tremendous progress, starting as a self-centered war profiteer and ending as the franchise's greatest hero. Despite his purest of intentions, Iron Man was susceptible to making mistakes, with some of these errors causing massive ripple effects in the MCU.
Tony's slip-ups are often used to vilify him, and they are indeed a taint on his legacy in the franchise. This is one of the recurring themes of Iron Man's decade-long MCU arc. In Avengers: Endgame.
Marvel Studios can utilize Tony Stark again as an unintentional villain when all of his Iron Man suits, so that no one outside designated persons can utilize them, then James Rhodes/War Machine and Stark Industries wouldn't have this big problem. Unfortunately, aside from not having the time to do this, perhaps, Tony also didn't believe that anyone was smart enough to help him with his work.
How Armor Wars Could Balance Tony Stark's Legacy
Until now, Marvel has had a hands-off approach to Iron Man's legacy, and understandably so considering how Avengers: Endgame beautifully wrapped up his story. However, this also has some drawbacks. For starters, the non-involvement of Stark Industries with Spider-Man's post-Avengers: Endgame issues makes it look like he has been abandoned by his mentor. And in Iron Man's MCU legacy by highlighting both its good and bad parts. Thanks to his involvement in the defeat of Thanos, Tony has somehow become a myth, as he's typically just ed for that. It's important, however, to recognize that he also made mistakes, not to ruin his legacy but just as a reminder that he was a human being.
Iron Man committed his fair share of crimes in the MCU, and they are what makes his story so compelling. Despite his best intentions, Tony Stark regularly made mistakes, leading to him being painted as a bad guy. This was a massive part of the character's arc and something that Marvel Studios shouldn't shy away from in their future storytelling, especially in Armor Wars, which directly reexamines the hero's legacy.