Final Crisis: Legion of Three Worlds #4

Synopsis

In the present, Starman digs up a body from a grave marked with the name Kent. Back in the future, Kid Flash joins the fight against Superboy-Prime. From the fight, the Time Trapper snatches the Legion founders and Superman and takes them to the end of time. Back in the 31st century, Brainiac 5 takes a select group to Superman's fortress where they meet Polar Boy's team. Prime arrives, but the Legionnaires delay him long enough for Brainiac 5 to revive Superboy. At the end of time, however, the Time Trapper assures his audience that he knows how this war will end because he is Superboy-Prime.