Are there any good paintings out there, I mean REALLY good, that depict Jedi scenes, and can be scanned full page?
Otherwise, I'm thinking the best route might be altering the normal Jedi poster and doing odd things to it. Giving it a red and green color scheme (Luke's saber green, background red), merging that with the "Vader" poster from Revenge of the Jedi.
There is that "fireworks" Jedi poster that depicts 3PO and R2 and some fireworks, that might be a nice element to use. I'm really not sure. I don't like a lot of the Jedi posters, apart from the official one. The painting just isn't any good on them. I don't like the UK one with Luke holding Leia, and the one with the Death Star exploding (badly painted) in the middle is merely "okay." The painting on the official one, on the other hand - really top notch.