Steven initially prepared a one-two punch.

He planned to attack Sheldon’s lower body with the first punch for messing around with a woman back in the day, causing all these problems.

This would be followed by the second punch that was meant to attack Sheldon for his violent manner of handling issues, which was the assassination of people that had led to such a huge catastrophe.

The first punch had missed the target. However, the second punch indeed hit Sheldon right in the face.