I'm guessing the JLA are fighting the new Shaggy Man in that solicit cover?
And I was thinking the answer to JL #19's "Who is the one person dangerous enough to use kryptonite against Superman?" question would be.....I dunno, Batman or something like that. Despero is an odd choice seeing as he's traditionally never needed kryptonite to beat up Superman.
I assume it'll go something like someone using Kryptonite against Clark and everyone is shocked and thinks they've turned evil, but it turns out they were only using the Kryptonite to free Clark from Despero who had been controlling him.
I was really thinking Batman as well since he isn't on the left side of the gatefold.
Pull-list: Action Comics, Batman, Superior Spider-Man, The Flash, Astro City, Detective Comics, Fantastic Four, Thor: God of Thunder
Are you talking about Generation Lost? Because the New 52 JLI did indeed suck.
I seriously miss Captain Mar-Vell.