Here’s a new image from the upcoming John Carter (of Mars) movie. From EW:
How has John Carter come to find himself in this predicament?
I don’t want to give any spoilers away, but basically he needs an army to solve his big problem in the third act, and the only army he knows was his previous captors. When he goes back, the game has changed, and he gets incarcerated. This is what he has to get out of. He has to get out of jail and not get killed by these apes in order to get his bigger problem solved.