So the Flash here really isn't wearing any pants... or any clothes for that matter. He's from a potential future of the DC Universe, Kingdom Come. There, the Golden Age Flash, Jay Garrick, becomes a living embodiment of the Flash Energy. That's why he's red... and naked.
Although, why he's able to still wear a helmet...
Yes, we used multiple versions of Atom throughout this series. They have 8 different figures of him for some reason, and we thought it was funny to switch them out.
Batman can make kittens dark and broody.
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.