In 2003, Morse, Mike Portnoy, Paul Gilbert and Matt Bissonette formed Yellow Matter Custard as a Beatles tribute supergroup. They took the name from a lyric in The Beatles song "I Am the Walrus": 'Yellow matter custard, dripping from a dead dog's eye...' On March 26, 2012, Morse released the first album of the newly formed band Flying Colors (Mike Portnoy on drums and vocals, Dave LaRue on bass, Neal Morse on keyboards and vocals, Casey McPherson on lead vocals, and guitar, and Steve Morse on lead guitar). In 2014, he gave life to another group, The Neal Morse Band (with Mike Portnoy, Randy George, Eric Gillette and Bill Hubauer), that released its first studio album "The Grand Experiment" in 2015. The group's second outing, "The Similitude of a Dream", was released on November 11, 2016, and the sequel to that album, "The Great Adventure", was released on January 25, 2019.