In the Fringe season finale "Over There", Peter is taken to an apartment, where he and Alt-Olivia discuss how the two universes are different. The Secretary (Walter-nate) left some personal effects for him, including a family photo and some framed comics.
DC Comics has an interesting interview with Geoff Johns and Hank Kanalz regarding these alternate versions of famous comics:
One of the first calls I got was from the director of the Fringe season finale – writer/producer/director Akiva Goldsman. He was shooting a scene in an alternate world where things weren’t exactly like ours. Where even the smallest details were somewhat off. Including the comics. Together with executive producer Jeff Pinker, Akiva wanted to showcase an array of DC Comics that could’ve been including the ones you can see below. He wanted them to be as authentic as possible. Something only the hardcore would really recognize.
Here are the covers of the Alternate comics, and I also tracked down the originals as well: