Why would a Vader/Fett little chat be of any use ? I mean, does Fett try to keep Luke alive at any point in the movie ? The idea sounds cool but nothing in the actual movie would be consistent with it.
He wraps him up with his arm cord thingy rather than just shoot him at one point on the skiff battle.
Then he stands up and starts shooting at him, prompting Chewie to warn Han about him.
Yeah, but if you’re reediting things so Fett tries to capture Luke, the rope-grab part can be repurposed. I’m just saying that there’s some existing material that could support this change.