I really think retconning Chewies death will take away a bunch of character development that Han had in the NJO, which would be dumb. Besides I don't think Chewie is needed anyways to make Episode 7 successful, and i think if they kept Chewie's death, it could be done in a way that would not leave film only fans confused. I just wish people could accept that he died, and that he isn't needed anymore in the GFFA. Sure he could appear in the EU, set sometime before his death, but his death signified the end of his journey. He had a great run, and he sure played his part in saving the world, but all heroes have an end, even Chewie.