While lost in time in the 863rd century, Booster Gold is confronted by Peter Platinum, a hero a million times more self-centered than himself.
Peter Platinum beat the Sons of Solaris, to get the attention of the Justice Legion Alpha. When he meets Booster Gold he is worried that Booster has found him to take a cut of his profits. He tries to pay Booster off to return to the 20th century and leave him be.
Peter bought his uniform from The Scavenger who most likely stole it from Rip Hunter. The suit has parts of Booster Gold's suit incorporated along with tech from Rip's Time Sphere.
Interacting with Peter conviced Booster to be a better hero, and be more selfless in the future. When last seen Rip had conviscated the Platinum Suit, again.