The image above was created by Otis Frampton and it features superheroes from the DC comics universe on the cover of a on a December 7th 1941 LiFE Magazine with a WWII soldier. Here's a not from the artist...
This is a digital commission featuring a magazine that came out a few months before Pearl Harbor was attacked on Earth 1. Or is it Earth 2. Ack, an existential crisis!
I love the retro look and feel of this image. I do have to say though that none of these heroes look like they belong in that era. They look out of place, but I still like the idea behind it.
Source: Otis Frampton (http://otisframpton.deviantart.com/art/September-7-1941-269602888)