While it would be cool to see Vader on Tatooine again, it’s ultimately a dead-end for him in terms of the plot. We know Vader is still interested in finding Luke, and a single scene with Boba Fett could communicate this. Also, the Emperor suggests that he has suspended his search for Luke temporarily when he says ‘And now I sense you wish to continue your search for young Skywalker.’
I like the slave mine idea. It would also be good to see increased security leading into Jabba’s palace, like some automatic turrets on either side of the big door and perhaps some more security in the entrance hall. Make it seem like this is really a well-defended fortress.
Now, there’s the perennial issue of Luke’s plan to save Han. Having thought about it, there’s clearly no master plan, merely a loose strategy. First Lando is sent undercover to get information about Jabba. Then the droids are sent as a peace offering to make a deal. When they fail, Leia is sent in with Chewie to break Han out, and when that fails Luke goes in alone. When taken as parts of a master plan, it makes no sense, but it does make sense if Luke were trying to learn from his mistakes in Empire. He’s now relying on his friends to help, trusting that they can take care of themselves in a dangerous situation. He’s also trusting the Force to guide his actions, rather than using its power in a singleminded attempt to overwhelm the opposition. It’s a mature, if rather chaotic, approach which suggests that merely by involving all his friends he is setting up a future victory, even if he cannot foresee such a victory. Communicating this would be tricky, and about the only avenue would be the crawl. Something like this:
Luke Skywalker has returned
to his home planet of Tatooine
in an attempt to rescue his
friend Han Solo from the
clutches of the vile gangster
Jabba the Hutt.
As he grows in wisdom, Luke
turns to the strength of his
friends and the Force to win
the day, even as his enemies
plot to destroy the Rebellion.
For little does Luke know that
the GALACTIC EMPIRE is secretly
constructing a new armored
space station even more
powerful than the first
dreaded Death Star…