Iron Man 2

[Xantar]

Apparently, Jon Favreau didn't get along with Terence Howard. We'll never actually know the real story of why they replaced him, though. Don Cheadle reportedly got the part three days before shooting began, so he probably wasn't feeling too prepared.

And I think the idea was that Tony knew he was dying, so he let Rhodey take the War Machine suit. But while we're talking about that suit, what were the drones made out of? They got cut up by bullets shot out of War Machine's wrist guns. Even if they were made out of plain old steel, no small caliber gun is that powerful.