J.K. Rowling sends internet into a frenzy with mysterious Harry Potter and the Cursed Child tweet
UPDATE: It turns out Harry Potter and the Cursed Child has a new tagline courtesy of J.K. Rowling " "Sometimes, darkness comes from unexpected places" " and new marketing artwork. That's it! EARLIER: Accio Harry Potter news? J.K. Rowling sent the internet into a tizzy on Thursday when she posted a vague tweet referencing Harry Potter and the Cursed Child along with an image of the production's design of V…