The men outside the tent will arrest him? That's not right. They are there for a different reason.
He's not about to travel back to his palace either.
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.