In the closing moments of today's Secret Invasion finale, Gi'ah frees the humans who were being held in New Skrullos after Gravik is defeated.
We see a few familiar faces who have appeared as Skrull imposters throughout the series, but get confirmation that Everett Ross is alive and well when he's woken up. He doesn't appear to be too shocked by what's happening, so was likely taken shortly before the events of this series began.
It's obviously a relief to know the former CIA agent will be back to continue fighting the good fight, particularly after Black Panther: Wakanda Forever set the stage for him to take on a very different role in the MCU. However, Ross is definitely shocked to see Rhodey there.
He asks the shaken Colonel how long he's been there, but when Rhodey attempts to get out of the Skrull contraption, he's unable to walk properly. Gi'ah helps him and mentions that he's been "held hostage for a long time."
Rhodey never speaks and this is the last time we see him in the episode, but both his physical condition and the fact he's wearing a hospital gown appear to confirm how long he's been there.
Yes, Rhodey has seemingly been a Skrull since the events of Captain America: Civil War.
In that movie, the real War Machine was injured during the movie's airport battle and we later saw him in that same hospital gown having an MRI. If he was switched out then, it means the Rhodey at the end of Civil War was an imposter, as was the version in Avengers: Infinity War, Captain Marvel, Avengers: Endgame, and The Falcon and The Winter Soldier.
This means he never got to fully regain the use of his legs courtesy of Stark Tech and, more importantly, that he doesn't know Tony Stark is dead. We have to believe this will all be picked up on in Armor Wars, though it's a real shame we never got to see his reaction to learning he's spent the better part of a decade on ice.
Marvel Studios can always choose to explain away that hospital gown, of course, but for now, it looks like there are some exciting stories ahead for this character.