How to even discuss this?
This would be a stomp for the Empire. Even without the Death Star, their Star Destroyers wield enough firepower to devastate worlds.
The following is a conversation from the PS2/Wii version of 'Star Wars: The Force Unleashed'.
Juno Eclipse: "Felucia - it reminds me of Callos".
Starkiller: "That's right, you were at the battle of Callos".
Juno Eclipse: "I 'led' the Imperial forces at the battle of Callos. Callos was just like this; overgrown, teeming with life...and we razed the planet. It's a dead world now".
It’d be like Independence Day but without the humans winning at the end.