It’s plenty terrifying when the threats you’re facing are right in front of you, staring you down. But in this week’s JUSTICE LEAGUE #4, which continues Scott Snyder and Jorge Jimenez’s breakneck debut storyline, “The Totality,” the League must fight enemies both large and small as they approach the mysterious object that has fallen to Earth from the now-shattered Source Wall. As Superman and Martian Manhunter confront the totality’s giant defenders, a second, even more perilous battle is taking place within their brains as Batman and Hawkgirl find themselves under attack by both Lex Luthor and Joker, who have stolen a ride to the totality unbeknownst to our heroes. And that’s to say nothing about the strange pathogens that have been attacking them since J’onn and Kal-El entered the energy field surrounding the totality.

But let’s go back to the Joker and Lex—did I mention that they’re actually inside Superman and Martian Manhunter?! It would be terrifying enough knowing the Joker is nearby…but inside your body?!? Talk about the monsters within. Snyder’s Justice League has really only been a thing for a couple of months now, but could this already be the end of it? Check out our exclusive preview to see how it all goes down.

JUSTICE LEAGUE #4 by Scott Snyder, Jorge Jimenez and Alejandro Sanchez is in stores this Wednesday.