I read this from a Spanish page and I found it interesting.
http://www.mundosuperman.com/elseworlds-adelanto-un-superboy-en-el-arrowverso-pero-cual/ …
I pass the translator to have you think: 
"Elseworlds" put forward a Superboy on the Arrowverse - but which one?
December 13, 2018 Miss Lane Leave a comment 
WARNING: The following article contains spoilers of the Arrowverse crossover "Elseworlds", which concluded on Tuesday on The CW.
After the conclusion of the adventures of the superheroes of The CW, we can safely say that all DC fans can now talk about the incredible challenge of the event: the next crossover between 'Arrow', 'The Flash' and 'Supergirl', which will take place in 2019, will be titled Crisis on Infinite Earths (Crisis in Infinite Earths).
This promises an adaptation of the series of comics of the same name, the favorite of the fans of 1985, a television event that will undoubtedly be as ambitious, epic and great as the comic. 
However, this was not the only great revelation that came out of "Elseworlds - Part 3". In addition to all the developments that alter the reality and action that destroys the universe, Clark Kent revealed that he and Lois Lane were expecting a child. Of course, this is a convenient way to put Superman out of the 'Supergirl' television series for a while. 
However, it is also a breakthrough in the life of the super-couple that makes us wonder if the Arrowverse is preparing to present Jon Kent, also known as Superboy. 
Jonathan Samuel Kent is a fairly new addition to the DC Universe. The character appeared for the first time three years ago, in Convergence: Superman # 2, written and illustrated by Dan Jurgens. Jon is the biological son of Clark Kent and Lois Lane, and has a physiology that is both human and Kryptonian, something that gives him the same powers as his father.
Since its introduction, Jon has become an important (and popular) character. To all intents and purposes, becoming the third pillar of the Lois and Clark duo, and an official cast member of the Superman titles. 
With his own supertraje, with red cape and the shield of the house of El, Jon Kent, of 10 years of age, has embraced the identity of Superboy and has fought along with people like his father, Robin and even Batman. Jon is now an important part of the Superman myth, and now it seems as if he is making the leap to television. 
Currently it is not known if Lois Lane is pregnant with Jon Kent, but given the popularity of Jon and his recent addition to comics, it seems most likely. 
Of course, it's important to note that "Elseworlds - Part 3" just revealed that Lois is expecting a child, which means that the birth of her son is not happening yet - and we are far from seeing a 10-year-old superhero Fly through National City with your aunt Kara.
However, the episode revealed that Lois and Clark will move out of the planet to the city of Argo City, where the surviving members of Krypton live. Given that the city is far away in the confines of space, we would not rule out The CW showing some kind of temporary change in the time spent in Argo compared to what happens on Earth. One year for 'Supergirl' could well be 10 for Argo. (Actually, a very similar development just happened in the pages of Superman # 6 - from which we will publish the review shortly) 
On the other hand, there is always the possibility that Jon Kent can come into play in the form of time travel. This year alone, both 'The Flash' and 'Arrow' have featured adult versions of Barry Allen's daughter, Nora (who traveled back in time from the future) and Oliver Queen's son, William (thanks to the use of scenes from flash forward).
What prevents the Arrowverse from adding another hero in the form of a child and with super powers? Who knows, maybe Nora, William and Jon know each other in the future ... and maybe they even have a league of their own. 
Now that we know that Crisis in Infinite Earths will arrive in less than a year, it seems that the Arrowverse will be in need of all the superheroes it can get: old and young, new and old. Since this event will serve as a sequel to Elseworlds, it is quite possible that we will see Superman return from Argo - and perhaps be accompanied by his own super son.