ream or Nightmare was the brainchild of Michael Schenker, Tony Iommi, Gary Moore, Kirk Hammet, Criss Olivia, George Lynch, Dave Chastain, Jake E. Lee, Metallica, Iron Maiden, Savatage, Black Sabbath, Queensryche and Judas Priest influenced guitarist Joe Sims (Full name Joe Simones) after he left is semi-solo career with his other projects Axemaster, Reign and The Awakening respectively. In 2001 his Dream Or Nightmare project would turn into a longer lasting band proper and further evolve his music beyond the turn of the millennium to feature fellow musicians Javier Colon (vocals), Jim Arnold (guitar), Dave Rhynard(bass) and Russ Kirk (drums).
But soon after forming the Dream or Nightmare banner, the line-up would change to feature Joe Sims (guitar), Jim Arnold (vocals/guitar/keyboards), Dave Rhynard (vocals/bass) and Russ Kirk (drums) to combine several styles of metal to create an original and unique sound. Now more than just basic thrash style they would include traditional, modern, and progressive metal on top of the old thrash, but also several other musical genres, a sound present in two demos released in 2001 and 2002 respectively; the first a self-titled, followed by the debut full length, Light Burning Bright Till The Dawn, CD in 2004.
Through the vocal combination of Dave Rhynard and Jim Arnold Dream or Nightmare's sound became more diverse by being both heavy and more melodic to compliment the aggressive and complex guitar work and keyboards of Jim Arnold, the heavy progressive bass of Dave Rhynard, and the energy of drummer Russ Kirk. The new CD displayed a definite maturity in style, a style continued in a more recent demo release (which featured the band's previous singer). Joe Sims, however, would leave in 2006 to rejoin the reforming Axemaster.