Okay! I have been rummaging around in past threads and find I'm remembering it correctly - they had a "Mini Star Wars Weekend" from May 17th - 19th to coincide with the opening of Episode ll : Attack of The Clones. No stars took part but there were many Star Wars characters in the parks, newStar War pins released, face painting and such.
There was no big publicity about the weekend in fact from looking at the posts, many people thought there would be no Star Wars weekend at all until just a short while before it took place.
Sorry, but I wouldn't put your hopes up on the basis of what happened this year.