I heard that Magnoliafan was planning on having a "cameo" by Neeson at the end of his ROTS edit, but unfortunately I'm not sure if it's actually coming out. It seemed like a pretty solid concept though-- place a voice-over from one of Neeson's other films in there somewhere, and place a ghostly shot of him at the end, when Yoda says "someone from your past has returned from the beyond" and remove the stuff about giving Obi-Wan meditation exercises to practice to communicate with him (since Obi-Wan can already see Qui-Gon with his own eyes, and that line didn't make sense anyway since Luke could see Obi-Wan with almost no training).