World’s Finest #154 (1965)
by Ed Hamilton & Curt Swan
Ah, the Super Sons. We’ll meet them many times over the course of the series, rest assured.
This is an “Imaginary Tale” that begins with both Superman and Batman marrying their love interests. Not sure why it’s a double wedding, though.
In a commendable move, the wives know about the secret identities. But it’s still the 60s, so they inevitably have to give up their careers once they marry.
“Remember Kathy, our identities are secret so I’ll talk about them out loud with lots of people right behind me”.
Uhm, if you don’t want anyone to be suspicious, why exactly did Bruce and Clark get married at the same moment?
For a moment I was worried Lois was going to end up as her extremely shallow self from her own series…
…but once Clark saves some people as Superman, she realizes that wealth and adoration are not that important after all. Not a bad moment for her, or for Superman.
It’s the husbands that come off a bit worse. Batman forbids Kathy from being a superhero (!!!) and Superman never told Lois where the Fortress of Solitude is.
If this was the insane Lois Lane of her own series, I would understand not telling her because there’s no way she’d keep her mouth shut.
But here? Superman trusts her with his secret identity, why not the location of the Fortress? It’s not like she can wander into it, it’s in the Artic!
And here it is: the first appearance of the very imaginatively named Kal-El Junior and Bruce Wayne Junior.
Nothing wrong with Bruce Junior, but… “Kal-El Junior”? That’s not even a Kryptonian name!
Even if Superman wants to give his son his same name, we actually DO know that naming conventions of Krypton don’t have an equivalent to “Junior”: Superman’s father Jor-El had the same name of Superman’s grandfather, but there was no “Junior”.
That’s from 1960’s Superman #141, one of the best Superman stories ever (his grandfather has a 1956 appearance too, but he’s not named in that one)
Back to the story, it’s time for the Super Sons to make their first impression!
And the future Superman Junior is not off to a great start.
So this leads to a falling out between the wives.
Still, I can’t be TOO harsh on the kids. They are at least trying to learn, although it’s kind of weird to see Superman described as “indoctrinating” his son.
Which is innocent enough with the original meaning of the word, but it has more sinister undertones today.
The kids decide that they HAVE to team-up, so they do without the consent of their mothers.
I’m not entirely sure Batman Junior is going to grow into the next World’s Greatest Detective.
Also I hope Batman doesn’t criticize them for talking about secret identities out loud, because I’m sure they learned that from him!
At first I thought the kids were WAY older, but we’ll soon see this is a very short guy.
Yeah sure, let’s follow that complete stranger that wants to get us inside a closed space without any other adult around, that sounds perfectly safe.
Only in the 60s.
Would you really need something THIS elaborate to “test reactions” of regular people?
And more importantly: if you invent THIS, would you REALLY need to turn to crime!?
Great job, Batman Junior.
Also, in case you don’t know: the idea that Napoleon was very short is just a myth.
OF COURSE he has tons of Kryptonite laying around. As the last remains of a planet that exploder decades ago on the other side of the universe, it’s the most abundant substance on Earth.
The “Napoleon of crime” is also a master of disguise (???).
Once Superman and Batman learn about the disappearance of their sons, they naturally start the search. And then allow both Batwoman AND Lois to join the search! Nice touch.
They don’t have to worry too much: as the son of the Caped Crusader, Bruce Junior has phenomenal aim with his feet. (???)
Wait, wasn’t the sword made of tinfoil!?
Soooo… is he a BAD master of disguise, or is Bruce Junior that unsettling?
Once Bruce Junior learns about the plan, he decide to disguise HIMSELF as well!
Which is actually rather unnecessary, since all it’s needed is for Superman Junior to show up.
Historical significance: 6/10
Even as an Imaginary Tale, this is just the beginning of the Super Sons nonsense.
Silver Age-ness: 10/10 
Does it stand the test of time? 7/10
It’s fine. Extremely simplistic from a modern standpoint, and you’d need to update some of the Silver Age tropes, but as far as the Super Sons go this one is harmless.
There’s much, MUCH worse coming for them. 
Did Robin actually do anything?
Did Superman really need Batman?
I believe the first use of the term “Napoleon of Crime” was when Sherlock Holmes referred to James Moriarty by that title, intended as a tribute to his genius and organisational skills.
The myth that Napoleon was short can probably be blamed on his Garde Imperiale, who were chosen from those in the ranks who were six feet tall or taller. Next to them, the average-for-his-time Napoleon appeared short. Well, that, and British propaganda, I suppose.
Though this story had plenty of Edmond Hamilton silliness, I much prefer it to the Bob Haney insanity that followed.