I can’t even begin to tell you how funny I find this picture. Not sure if it’s Robin going crazy as the only one biking or if it’s the ridiculous way Batman and Superman are sitting on the bike. Either way, I cracked up.
You can see more funny (and real) comic book covers here. FYI – Superman was not such a nice guy in the old days, at least if you’re going to judge by these images.
The Romance Factor 
http://superdickery.com/ is full of these things…so much fun to read