BTS has unveiled the trailer for its upcoming documentary film “BTS: The Return,” offering a glimpse into the group’s journey as it prepares for the release of its fifth LP, “Arirang,” on Tuesday. Released on Netflix and BTS’ official social media channels, the trailer traces BTS’ past, present and future, as the members look back on their career from previous years and work to shape the next chapter of their career going forward. The trailer features scenes from its previous world tour, members