BY MATTHEW PRICE Features Editor mprice@oklahoman.com She's gone from the Joker's girlfriend to the star of a top-selling comic in her own right. DC Comics will celebrate the 25th anniversary of Harley Quinn with Saturday's "Batman Day" focusing this year on the sometime supervillain who more recently has become an antihero more likely to mete out justice than face its wrath. Quinn originally was developed for "Batman: The Animated Series," first appearing in the 1992 episode "Joker's Favor," created by Paul Dini and Bruce Timm.Read more on NewsOK.com