When K-pop powerhouse BTS takes the stage for its comeback performance at Seoul’s Gwanghwamun Square, Saturday, the moment is expected to carry significance beyond a typical return to the spotlight. More than a decade after debuting in small studios and modest concert venues, the seven members will perform in the symbolic center of the Korean capital — not only as returning superstars, but as artists whose rise has reshaped the scale and global reach of K-pop. The performance coincides with the release of "ARIRANG," BTS' first full-length studio album as a complete group in nearly four years and its first major collective activity following the completion of its members' mandatory military service. For fans and industry observers alike, the Gwanghwamun concert represents a key moment in BTS' trajectory, as well as a test of the group’s continued global drawing power. BTS — consisting of RM, Jin, Suga, J-Hope, Jimin, V and Jung Kook — debuted in June 2013 with the single album "2 Cool 4 Skool." At a time when the K-pop industry was bombarded with rookie groups, the group distin