Green Lantern, Vol. 2 #214A

I Think, Therefore...
Ch'p and Ub'x travel to the future to retreive Salaak, while Kilowog fills in Hal and Arisia on what's been happening to him in the meantime. Salaak now thinks he's Pol Manning, and has been leading the war against the species that Ub'x created through his experiments in the 20th Century.
Release Date: 1987