Richard will travel back to his palace? There is no evidence for this.
The men outide the tent aren't about to arrest him either. They are there for a different reason.
The correct answer is he will go into battle, at the Battle of Bosworth. There are three clues. First, there are many military tents on the left of the picture. Secondly, Richard's armour is at his feet. Thirdly, he is ready for battle with his sword in his hand.