Once he ruled CYBERTRON with a brutal (and literal) iron fist... left for dead four million years ago, SENTINEL PRIME is back. But in a world where STARSCREAM rules CYBERTON, OPTIMUS PRIME has invaded Earth, and MEGATRON is an AUTOBOT--SENTINEL doesn't like what he sees! Collects the Titans Return one-shot, Transformers #56-57, and Transformers: More Than Meets The Eye #56-57.