Universal Orlando will announce more Diagon Alley/Hogwarts Express later this week by Clint · March 10, 2014 Universal Orlando released a new teaser trailer today that gave us a date, this Friday. What will we hear? Most likely more details about the Hogwarts Express attraction that will link Diagon Alley and Hogsmeade. We will let you know what we hear this Friday. Keep it tuned to our Facebook and Twitter also.