This Is My World is a track from the score for Batman v Superman: Dawn of Justice. It was composed by Hans Zimmer and Junkie XL. It is featured near the end of Superman, Batman, and Wonder Woman's battle with Doomsday. The piece enters with a piano motif for Superman, then continues with a somber string ballad accompanied by piano. This latter melody is comparable to a classical requiem.
This track borrows from another, If You Love These People, from Man of Steel.