I’ve always imagined an opening scene from this entry deep down on the lower levels of Coruscant where it’s always dark and stormtroopers (original look) with dirt/oil and grime covering their uniforms patrolling an area and sandtroopers with really oxidized orange shoulder pads. With massive black abysses directly next to bars/warehouses and faint neon lighting. Almost suffocating in darkness/grime where you almost catch your breath when the setting changes.
Possibly Luke or his only apprentice moving through the shadows (his face not shown) lighting up his lightsaber in pitch black darkness where it’s the only visible thing. Taking down a few grime covered stormtroopers and on his way to a Tie Bomber factory (Tie Bombers were missing in TFA) to steal one and use it against the factory.
Jumping from hovering dirt covered/putrid garbage containers using the force for prolonged jumps to make an entry to the factory. With also holding an officer over an oil container using force grip for the passcode into the building.
This could have been an interesting way to start the film and setting. I like the atmosphere of the idea and the mysterious feeling of it. It’s almost like Leon: The Professional where he isn’t shown completely in the beginning and taking out all the enemies.