India, Jan. 24 -- As Border 2 marches into theatres, the spotlight isn't just on tanks, trenches and patriotism, it's also on a song that defined a generation. The return of Sandese Aate Hain has reignited a debate around nostalgia versus originality in Hindi cinema, drawing reactions from lyricist Javed Akhtar and original singer Sonu Nigam, who believes some melodies are inseparable from the stories they were born in.

Sonu, who originally lent his voice to Sandese Aate Hain, has re-recorded the track for the sequel under its new title, Ghar Kab Aaoge. While the melody retains its emotional core, the song introduces fresh lyrics penned by Manoj Muntashir. The soundtrack also features voices from Arijit Singh, Diljit Dosanjh and Vishal S...