TheBoost said:

It is Leia, not Luke, who organizes the rescue. In fact, dialogue dictates that a while back Luke sent R2 to Leia, and no one has seen Luke in a while.
Leia's plan needs R2 in the Palace to help her deactivate the carbonite. Lando has already snuck in, 3PO and R2 hand themselves over, and Leia comes in disguise. Just like in the film she and Han (and R2) get caught.

I like the idea of R2 helping out Liea. Good stuff

Then Luke shows up, all mysterious. My brother and I both thought some kind of visual to cue that Luke had changed was in order. We had four ideas.

-Long hair. Akin to Anakin in ROTS.
-Short hair, like Anakin had in AOTC, minus the rattail.
-An Obi-Wan-esque cropped beard.
-Make up to show the scarring he recieved at Vader's hands healed poorly.

As great as something like this would be, I don't see it being possible...except for possibly the "rattail". I've actually made a mockup of this a while back...I should post that sometime...

During the skiff battle Chewie should toss some dude like a football into the Sarlac. Seriously, Chewie never gets to cut loose.

That would be great!

Luke returns to Dagobah, where it seems he's been for some time, training. He rushes back because Yoda is ill. THe scene plays the same, but when Luke asks if Vader is his father, Yoda says "Ah, the question you've never asked." implying the issue had been an elephant in the hut for some time. This way we have a reason for why Luke is suddenly so badass, he's been with Yoda all this time.

I've been wondering what could be possible here...and adding that Yoda line would work wonders for this scene! Surely we could find someone who could do this one line!

I like alot of your ideas, TheBoost...I just thought I'd comment on a couple of them... :D