To celebrate Green Lantern's 75th anniversary DC is doing 25 variant cover this September check out Green Lantern #44 and Sinestro #15 below and view the slideshow for all the others.

STAR TREK/GREEN LANTERN #1 SDCC 2015 EXCLUSIVE EDITION
(W) Mike Johnson (A) Angel Hernandez (CA) Joe Corroney

Two iconic franchises collide for the blockbuster crossover event of 2015! The crew of the U.S.S. Enterprise meets the Green Lantern Corps for the first time in an all-new adventure that spans the cosmos! Don't miss the thrilling first chapter of THE SPECTRUM WAR, as Kirk and Spock make a most unusual discovery on a lost world... igniting events that will change the fate of empires! LIMITED TO 3,000 COPIES!