I know who Superman is, but who is the guy on the far left, you ask. Well, as far as I can see, there are no guys on the far left. Did you mean “far right”? You’re so silly. The guy on the far right is called Booster Gold and he is among other things a time traveller from the future. http://dc.wikia.com/wiki/Booster_Gold Nor his identity or his time travels has any bearing on the meaning of this comic though. He could just as well have been swapped for a cactus, one that wasn’t even time travelling or contemplating to do so. Yes, a very rare cactus like that. Here’s one with a cat on top of it. http://laughingsquid.com/bobcat-sitting-on-top-of-40-foot-tall-cactus/ I wish I had swapped him for a cactus with a cat on top.