What Dreams May Come features music spanning more than a century, beginning with Gustav Holst's Suite No. 1 in E Flat, composed in 1909, and ending with Omar Thomas's Come Sunday that premiered in 2018. Also included are Steven Bryant's Suite Dreams, first performed in 2007, and David Maslanka's A Child's Garden of Dreams, described by the composer as "a symphonic suite for one-on-a-part wind ensemble."