I know they have had Star Wars weekends for the past 4 or 5 years or longer, and it gets more crowded every year, so I don't see why they wouldn't have it again next year. and yes, it usually starts in May.
Its a fun event. we have seen alot of the celebrities like Carrie Fisher, Billy Dee Williams, Warwick Davis, Daniel Logan, the guy who plays c3po, the guy who plays Chewbacca and others. its alot of fun and the behind the scenes show is pretty neat too. I also love the parade with the Star Wars characters. also, the flower and garden show will be going on at EPCOT and thats always nice.