This Sunday, at 2 p.m. at the D23 Expo in Anaheim, attendees will be treated to a special preview of The Lion Guard: Return of the Roar, the television film airing in November on The Disney Channel.

AJ McLean of the Backstreet Boys is taking on a fun new role on the second season of Disney’s The Lion Guard, a spin-off series of The Lion King that follows the adventures of Simba and Nala’s ...