I liked the music as the armies were marching to the impending battle. The only instrument on the soundtrack was a drum: >DUN dun dun dun DUN dun dun dun DUN dun dun dun DUN dun dun dun<. It sounded to me like a heartbeat, getting louder and louder and faster and faster. It was the only sound in the movie until the arrows started to fly.
Also, the scene ends with the camera on Mark Antony, once again giving a slight smile as he watches the chaos below. Hmm...is he smiling because he is avenging his hero Caesar? Or is he up to something?