A staple of the genre: super-smart characters always had enlarged bald heads to hold their powerful brains. But even the Future Brain of Future Batman seems unable to construct a simple logical argument. My brain is so mighty, I don’t even have to mask my identity any more! 

Let's take that one apart. First of all, it's complexity that indicates a powerful brain, not size. Otherwise elephants would be carried around Paris trumpeting orders over the phone. Second: the reason you masked your identity before had nothing to do with IQ, but your desire to establish an extralegal persona. Third: if you're taking off the mask to show how smart and hyper-evolved you are, well, I think the fingers made that point already.

Four: his argument fails to consider his position in the space-time continuum. Judging from the train, he’s obviously in mid 20th century America, and so he would need to mask his identity, lest he screw everything up for the Batman in this temporal plane. The engineer could probably tell the Daily Planet he saw Bruce Wayne with his head all light-bulby, wearing a Batman costume! Same rectangular ass, too! Not that I make a point of lookin', but you couldn't help but notice.

It should probably be noted that the engineer most likely does not give a frog’s fart about Future Batman’s identity.

Then there’s the Cave Man of Steel, who, like our early rock-dwelling pre-civilization forebears, would refer to monsters in terms of their metallic composition. Perhaps this Superman wonders what kind of cave this is – iron monster come in one end, go out other, then other iron monster come in from the other side and go out front. Me move to better cave. Where me club? Me can fly and kill dinosaur with hands but club part of genre.