Batman: The Brave and the Bold focused on the lesser-known individuals that portrayed the heroes, such as Guy Gardner and Jay Garrick, rather than the more popular, better known Hal Jordan or Barry Allen, until Barry appeared in the second-season episode "Requiem for a Scarlet Speedster!" (though this episode centers around Kid Flash and Jay Garrick) while Hal appeared in the first-season episode "The Eyes of Despero!" as well as the third-season episode "The Scorn of Star Sapphire". In the episode "Bat-Mite Presents: Batman's Strangest Cases!", Batman even teamed up with Scooby-Doo and the Mystery, Inc. gang to defeat the Joker and the Penguin in a
Alter Ego (soundtrack) to promote the film in the mainstream. Rouvas contributed vocally to five songs on the soundtrack, two of which, namely "One With This World" and "Nothing" were duets with his co-star Doretta Papadimitriou and were performed in the film by the actors as the group "Alter Ego". The song "Suspicious Minds" was written by Mark James and originally performed by Elvis Presley, but was covered by Rouvas. The majority of the songs are performed or titled in English, as was chosen by the film's producers for marketing reasons. Other than Rouvas, vocal performers include Dimitris Wang, Vello Leaf, V-Sag, Alexandra