Officer: “Lord Vader, we picked up your distress signal on our long range scans. Is...is it true about the battle station?”
Vader: “It is indeed. Prepare for my arrival.”
Officer: “Lord Vader...shall we transmit the data to the emperor?”
Vader: “No…I will deliver it to the emperor myself.”
Officer: ”As you wish, Lord Vader.”
Maybe this can work? I think using Coruscant would work better too rather than using the Executor, since the big reveal in "Empire" would be dimished. The whole idea of a short range fighter getting back to the capital may seem far fetched but hey in terms of drama, suspension of disbelief can work wonders in getting a point across, plus Coruscant makes for a better image in the distance.
Maybe even adding in Star Destroyers surrounding the planet also adds to the image.