Give it to us, please 
Oh, its more a vague idea of theme than a specific plot. But basically, something along the lines of. . . Rhodey, as a successful and famous hero who is also physically disabled and relies on cybernetics and prosthesis for daily life, gets involved with some kind of "cyber limbs for disabled veterans" type program, both as an advocate and mascot, and also to help the people accepted into the program acclimate to their new normal. While doing this, Rhodes has to reflect on his own inner life and thoughts on the matter, which are a lot more mixed as he contemplates how he ended up here.
Then, since superhero story, eventually someone connected to or involved in said program tries to divert the recipients into a "Make my own cybernetic minions" villain plan. Maybe a corrupt officer or scientist on the inside, or maybe someone on the outside with agents inside who tries to recruit the participants out into "something even better". But basically, people end up offered the chance to become even better, stronger, more whole. . . and all they have to do is just follow orders. Rhodey now has to both save the day in the sense of stopping the villain, but also save the souls, so to speak, of the disabled veterans who are being exploited and abused. And in order to do that, he has to fully come around and understand the key concept: no, you absolutely can't "just obey orders", you have to be willing to go "No, this order is unacceptable". Illegal Order Doctrine is a thing, and Rhodey himself knows this personally and can speak to it because he himself screwed up and was on the bad side of it, in Civil War.
In the end, he saves the day, stopping the villain and inspiring at least the majority of the veterans to join with him. There is probably a scene where he is deprived of his armor and his prosthetics are shut down, and he still overcomes because ultimately, Rhodes is a hero, and he'll do whats needed even if he has to literally drag his body along by one arm while shooting at the bad guys with the other. And afterwards, he finds a degree of personal peace, because he realizes that he had been subconsciously treating his paralysis as *punishment* this whole time. Now he admits that, no, its not punishment, not something he needs to wallow in, its just a fact, a result of choices and happenstance. If its the result of bad decisions, then that just means it can be a reminder to make good decisions in the future, and to help others make those good decisions, too.
Essentially, there are two core themes: "Orders and obedience don't excuse unethical behavior" and "Past actions and consequences will always be with you, but one mustn't use them as an excuse to not act and change in the future".
