WARNING SPOILERS!!!!
Ok, so i went to see Return of the King again tonight with my family and i noticed something. I had noticed this once before, but i noticed it a lot more this time.
There is a ridiculous amount of similarities between the two movies, especially in return of the king. I'm not exactly sure why, but i have a lot of theories. First of all Lucas based his movies off of mythology and it seems also off of LOTR. I was talking with my dad and he said that Lucas was good friends with this person involved in mythology that had studied at the same school as Tolkien years prior (i'll try and find out how accurate that is). This would make perfect sense. Also i would not doubt that Jackson also paid homage to Lucas with other shots as well. so here are the things i have noticed, and i'm sure i've missed others so please do add to the list. (btw i don't consider ep I or II to be real star wars, so they don't count for the discussion

)
1) As vader is dying in luke's arms:
Luke:"I'm going to save you"
Vader:"You already have Luke, you already have"
As Theoden is dying in Aowen's arms:
Aowen:"I'm going to save you father"
Theoden:"You have already saved me"
2) The elephants attacking Minas Tirith remind me of the AT-AT walkers. also note how Legolas scales one of the elephants to take it down in a similar way in which Luke scaled (or rather cranked) his way to the belly of an AT-AT to take it down
3) The overall idea of good versus evil in the grandest sense and how the Evil Empire is set to take over control over the universe in the same way in which sauron means to take over middle earth
6) Only the super elite enemy forces are not complete idiots. anyone ever seen a storm trooper hit anything more than 5 feet away from them? Likewise, how many important characters has an orc killed? the only one i can think of was the Elf leader in Two Towers at Helm's Deep (which wasn't in the book from what i hear anyways).
7) Character Similarities - they're everywhere
Emporer Palpatine - Sauron
Luke - Combination of Frodo and Aragorn
Gandalf - Obiwan (especially take note of the similar relationship
between Frodo-Gandalf and Luke-Obiwan)
Vader - Combination of Sauroman and Theodin. Sauroman for obvious reasons and Theoden because he fell to the dark side much as Theoden had fallen to sauron and then comes back to the light side later.
Han Solo - Aragorn and Sam
R2D2 and C3P0 - Mary and Pippen
Leah - Aowen
Wedge - Sam
btw, please excuse spelling and/or forgotten names as checking all of this would take a week

Also i don't think this is Jackson ripping off Lucas, but more Lucas taking ideas from tolkien (although there is obviously some homage by Jackson of Lucas)