Check out the glorious George Perez/Jerry Ordway art for Planet of the Apes/Green Lantern crossover.
George Perez Variant For Green Lantern/Planet of the Apes #1 Revealed
Russ Burlingame - 01/06/2017
It seems likely that the Planet of the Apes/Green Lantern crossover will have to directly address the idea of a multiverse. Assuming that DC's future is destined to be the world from the Planet of the Apes franchise asks more questions than it answers.
On the other hand, Jack Kirby's fan-favorite fantasy series Kamandi was famously created when Kirby, hoping to get the Planet of the Apes license, couldn't do so and instead set out to make something similar enough to scratch that creative itch. Soon, DC will launch a year-long maxiseries The Kamandi Challenge, which would be written and drawn by a different creative team covering a different part of the world of Kamandi every month.
Perez will provide interconnecting variants for issues #1 and #2 without order restriction. Additionally, each issue of Planet of the Apes/Green Lantern will be solicited with four variant covers featuring a movie poster homage, a Silver Age comics homage, a Spectrum cover, and an action figure cover.