
It's interesting the 4A devs definitely had the idea of Artyom being a father in the aftermath of Metro: Last Light based on a couple residual clues
Screenshot from a post done by u/NiuMeee
Screenshot from a post done by u/Rotated_text
Not super new ground but I've been playing Metro 2033: Redux again and seeing the kid running around in the menu screen in a version that was released well after Last Light made me think the devs early on almost definitely had the idea in mind of Artyom becoming a father. It's one thing to have a kid show up in a throwaway slide on a bad ending, but having that kid show up in the 2033 menu strongly implies to me the devs had bigger ideas on Artyom's fatherhood. It would have fit thematically as well given a huge part of Artyom's identity, and a core theme in Last Light, was essentially parenthood. Not knowing his mother and sort of living in the void of having no direct family (RIP Sukhoi lol). A third game could have focused on Artyom now having to be a parent while dealing with the dangers and horrors of the metro as a sort of flip on Last Light.
Regardless, I do think the devs were planting the seeds of Artyom being a dad, but obviously the ideas was very rudimentary and not baked into future plans. It was likely scrapped very early on in pre-production or maybe was never even brought up at all during the troubled production of Exodus. It is to my understanding the devs weren't the most pleased with how Last Light turned out and wanted to essentially do a soft reboot and move away from a lot of Last Light, even if that meant essentially scrapping whole things that were established. So the kid (and Anna because lets be honest Anna 1.0 and Anna 2.0 are completely different characters in all but name and relations) were scrapped to focus on the themes and ideas of Exodus without bloating it with a parenthood arch.
If anyone has any further information on the kid and ideas had with him between the release of Last Light and development of Exodus I'd love to know, but this is my speculation/thoughts/ramblings about what I think was an artifact of 4A's vision on what the third game would have focused on before that third game existed at all.