Delirium, as Cirque du Soleil's first significant experiment with arena venues, eventually helped pave the way for the company's subsequent show-by-show conversion of its older big top productions (e.g. Saltimbanco, Alegría, Quidam, Dralion, and Varekai) to a more cost-effective arena format.

As the show's concept incorporated a contrast between stark urbanness and wild imagination, Michel Robidas (costume designer) drew inspiration from clothing from different eras, including the 1930s, 1960s, and 1970s, for the wanderers of the performance (i.e. the musicians), whereas bright colors and exuberance were emphasized for the acrobatic performers.

There were also purple or red and yellow whirling dervish robes, designed to look like tree roots, which started from the chest rather than the waist for a more dramatic effect.

[3] Much of the show's music was creatively adapted from the original scores of other Cirque du Soleil productions, but remixed with a tribal beat and lyrics added or rewritten.

The lead vocalists on the CD are Dessy Di Lauro, Elie Haroun, Jacynthe Millette-Bilodeau and Juliana Sheffield.