The DC comics influence is pretty clear. As silly as it is, it makes you curious about the contents of the book, doesn't it? I actually kind of dug the way Gruenwald tried to hook people with the covers of his books. (Yeah, he didn't draw them, but I think he dictated the contents.) On the cover of issue 344, Cap is fighting President Reagan, who's been transformed (by the evil Viper) into a half-lizard man!
Sadly, these days comics covers are generally serious looking portraits or action shots: