In the opening moments of the new trailer, the original trio's reunion is shown in more detail with Radcliffe, Watson, and Grint all laughing joyously as they recall their experiences working on the films that made them stars. Later, Radcliffe is seen walking down the main street of Diagon Alley, much like he did in "Harry Potter and the Sorcerer's Stone." We have to wonder if Radcliffe will be accompanied at this moment in the special like he was in the original film, with Hagrid (Robbie Coltrane) at his side? We already know that Coltrane will appear in the special.

Meanwhile, Watson takes a walk by Platform 9 3/4 at King's Cross and is later greeted by Tom Felton, the actor who played Draco Malfoy, with a hug in the Great Hall at Hogwarts. Watson says, "It feels like no time has passed and loads of time has passed." Grint follows this up by saying, "I think this is the perfect time to sit down with everyone and reminisce," while Radcliffe adds, "The thing that scared me the most was the implication that the most meaningful thing in our life was done and there's something so curious about seeing everyone and being like, 'It wasn't though.'"

Throughout the new, nearly 2-minute trailer, various stars of the "Harry Potter" films are shown reuniting and commenting on the franchise. Additional original cast members set to make appearances in the special include: Helena Bonham Carter, Ralph Fiennes, Jason Isaacs, Gary Oldman, James Phelps, Oliver Phelps, Mark Williams, Bonnie Wright, Alfred Enoch, Ian Hart, Toby Jones, Matthew Lewis and Evanna Lynch. Producer David Heyman and directors Chris Columbus, Alfonso Cuarón, Mike Newell, and David Yates will also appear. Notably, "Harry Potter" creator JK Rowling is not set to appear in the special.