Earth Sentry (John Foster) was created by Tom DeFalco and Ron Frenz, and first appeared in A-Next #2 (1999) in the MC2 universe. When John and his father Bill were investigating a UFO crash site, they discovered a Kree space probe. Upon nearing the ship, the automated defenses activated, and a robotic sentry was released. Bill activated a distress signal which was picked up by Mainframe and the rest of A-Next.