Even if they did swap back to their own bodies, at this point it wouldn't really work as an "ending" for me since the story would have to show them spending effort in readapting back to their own bodies for me to accept it.
This is probably one of the most stupid premises I've come across in a good while, the only reason there is a misunderstanding is because the characters are too stupid to even try getting it cleared up.
This story seem quite clumsy, was there seriously no better way to inform the reader of the setting than having a foreign minister so ignorant of his own job that he has to have the regional situation explained to him in a infodump?
I like the story and I realize Scipio is meant to be the main character, but I still feel the author is giving him too big of a role in the early stages of the war.