Hitler's back. A mad scientist thought he could reform him; make Hitler a productive member of our future society. He was wrong. Now, the only thing standing between mankind and total oblivion is Albert Einstein. Einstein has hand picked the greatest minds in history to face off against this great evil. But who will prevail the latest iteration of The Third Reich? Or the Heroes of Science!

Annotations and commentary

Panel 2
Einstein tools around in a space-Humvee. The reason is of course because Humvees are completely badass. On top of that it's hard to imagine a space worthy Humvee. These facts conspire to give Einstein his primary mode of locamotion.
The narration bookends the story by repeating large swathes of vaguely appropriate text, which links back up to the shocking end.
Panel 6
From this far vantage point we can't see John Wayne Gacy being corpsified. Combine that with the well known comic law that "If there's no body they're not dead," and you get some interesting results. Will Einstein have to confront his inner demons and fight more clowns later? Only time will tell.