"There Is No Escape From the Anti-Ares" from Hercules Unbound #12 (DC, 1977) by Cary Bates and Walt Simonson
For a relatively obscure 12-issue series from the late 70s, Hercules Unbound certainly got a lot of A-grade artists working on it. José Luis Garcia-Lopez (praise be his name), Wally Wood and Walt Simonson?! Despite its artisitc credentials, Unbound was unlikely to succeed. It featured a Greek god better known as a Marvel character. It took place in an alternate, postapocalyptic future (I guess it was Kamandi's, but the action preceded it considerably). And it sometimes co-starred the Atomic Knight. Yeah, that was gonna get the kids to plonk down their lunch money. They never did release that Showcase Presents collection, did they?