All images in this post are from: Before It's News. Image from Another Earth (2011) © Fox Searchlight Pictures.
There have been a lot of loud complaints and a hell of a lot of kicking and screaming in the fanbase about DC Comics' September 2011 reboot, in which the famous pulp company tossed 75 years' worth of history out the window in an effort to catapult itself into the 21st century. The open wound that is DC's handling of the Titans aside, I have written a post on how DC's shifts to new entertainment genres and new media (such as digital publishing) correspond with the transformation of the comic publisher's fictional universe. I have asked whether those Fourth Wall and metafictional turns may lead to the discovery of new standards for heroic values in pop culture. I've also talked about how comics stories, especially at DC, are the only forum in pop culture where quantum physicists' ideas of a multiverse have been consistently and constantly considered over several decades.
"There may be inifinite Earths being infinitely created."
DC's characters, stories and tumultuous reboots actually contend with the problem of what it would mean to live in a mulitverse, assuming it existed. What would happen to reality? Well, DC speculates, some of us would become superhuman, but at a terrifying price. What would happen to people in that reality? What would happen to values of right and wrong? Good and evil? No one else, not even the quantum physicists who are looking at the multiverse as a possible scientific fact, are pondering would it would mean for all of us if their wild theories aren't just theories.
"Reality may be more tenuous than imagined."
Now, some weird online stories about 'real' cases of people have surfaced (here) who claim they have shifted from one parallel universe to our world; these accounts are exactly mimicked in the storyline of an upcoming May 2012 DC title, World's Finest (with the great George Perez serving as co-artist): "Stranded on our world from a parallel reality, Huntress and Power Girl struggle to find their way back to Earth 2." The oldest team of comic superheroes, the Justice Society of America, finds itself on the alternate Earth 2 in another new series, simply called Earth 2.