Yes, that would be something. I already see it: just after the flashback we have the shootout. They both fire they wheapons at each other, but we can't see who has won the fight, because camera is now switched to the Jill and Cheyenne scene. In the middle of their conversation, we hear someone approaches to the house. Of course, we can hear someone behind the front door.
Squeaky sound, doors are open, and we can see that someone ( or something has cast the shadow!!! ) inside the house.
Now camera is switched to Jill's face so we can see her emotions. First she is happy,

because she believes in Harmonica's skills with a gun, but then her face become grey

, and finally we can see a horror written all over her face.

In that exact moment music swells, and the music is "As a Judgement". Camera is now on the face of Henry Fonda, focused on his lips, and camera is going up, so we can see his face. Sinister smile.

"I am back as I promissed. We gonna have a little more fun, you and me...and after that...well."..Frank replies.
In that moment Frank becomes aware of Cheyenne's presence.
So you have a protection, heh...as he gaze in Cheyenne with his beautiful, nasty and cold blue eyes.
Frank drows.So as Cheyenne.
*possible spoiler*
Cheyenne managed to shoot him in the shoulder, but Frank was a little faster, so he shot Cheyenne right in the heart.
"Well, looks like we are all alone now. Finally, some privacy." Frank approaches to Jill and only moment before he reached her, we can hear the sound of the Harmonica.
Camera takes Frank's point of view, slowly turns and we see white light is in the house, and Harmonica as he is standing at the door. Once again, he is shot in his shoulder, he bleeds, but it seems that cannot stop him.