According to insiders on December 20, Big Hit Entertainment's brand new boy group is currently preparing to debut some time in early March of 2019. 

Previously, Big Hit Entertainment told media outlets, "We are preparing for their debut some time in early 2019. Once we confirm the debut group's members, debut time period, concept, and more, we will notify you."

Furthermore, it seems that earlier rumors of the boy group members undergoing a survival selection process through a reality program were proven to be false. Stay tuned for updates on BTS's younger brother group.