Here’s an idea: at some point after the Emperor’s death, we cut to Jerjerrod’s conflict scene, starting with a voice off-screen telling him that there is a message from the emperor’s chamber. We then hear that the message says to blow up the Destroyer at once. Jerjerrod looks at the other officer. We then cut to Vader’s death scene.
The audience can infer that the message is infact from Luke, giving his defeat of the Emperor some bearing on the actual battle plot. Again, this is just an idea.