Don Cheadle almost starred in a solo took over the role from Terrance Howard in the sequel, and has remained in the role ever since.
The superhero gig has seen Cheadle reprise the role four times since he made his debut, but none of them have seen him take on a leading role. Rhodey has still received a decent amount of character development in these ing roles, as he became a true member of the Avengers, was paralyzed, and Black Panther writer Joe Robert Cole, and now Cheadle is opening up about what could've happened.
Related: War Machine Was Intended To Have A Bigger Role In Infinity War
During an interview with Iron Man 3. Now thanks to Cheadle, we now know that War Machine would explore the tension that rises between Rhodey's two different lives.
There was definitely going to be a lot of tension between his job as a military man and his allegiances to the code that he swore an oath to uphold, versus the changing world. I think they probably would have run afoul of each other a little bit, but I don’t know if he would have been a straight fugitive, or if he would have become decommissioned. But there was definitely going to be some tension between those two worlds.
If this movie did come in Phase 2 of the MCU, it sounds like War Machine would've been the latest film to dive into politics. This was a successful direction for Captain America: Civil War, to show exactly how the government and military feels about superheroes.
Unfortunately, this concept Avengers: Endgame or not, but Disney+ could give Cheadle and Marvel the opportunity to explore this story either way.
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Source: EW