After launching an online countdown on their official website counting down to Friday, October 2 at 1:00 p.m. EST, the band offered up an audio snippet of an unidentified track from the project featuring the rhythm section of bassist David Ellefson and drummer Chris Adler.

Megadeth have expanded the preview with the addition of rhythm guitar in the mix. The band posted on social media: "System 3, Rhythm Guitar Booted: Listen here: system.megadeth.com� #megadeth15"