the article reads in the first modern day batman film batman's parents are murdered by the joker however in the fifth modern day film batman begins his parents are shown to be murdered by a street mugger however i don't think batman begins should be considered a retcon it doesn't appear to be intended to be a part of the same continuity as the previous four movies just as they aren't intended to be in continuity with the tv show and the tv show isn't in continuity with the comics