The Lost Years were the time on Cybertron between when the Ark left and Megatron resumed contact with Shockwave in the modern era.
During this time, Elita One led the Autobots on Cybertron, and Shockwave led the Decepticons.
Known Forces left behind on Cybertron[]
Autobots[]
- Alpha Trion (Autobot advisor)
- Emirate Xaaron (civilian leader)
- Elita One (rebel leader)
- Omega Supreme (with much time spent off-world, hunting the Constructicons)
- Kup
- Omnibots
- Sky Lynx
- Steeljaw
- Tank
- Ultra Magnus
- Wreckers
Decepticons[]
- Shockwave (military operations commander)
- Constructicons (with much time spent off-world, hiding from Omega Surpreme)
- Deluxe Insecticons
- Octane
- Rainmakers
- Ratbat
- Straxus
- Terrorcons
- Valour