I just realized I have no idea if the movie resolved this: In Mad Max Fury Road, one of Immortan Joe's main motivations is getting back the woman who is pregnant with his child(s).
Later in the movie she dies and the war boys cut her open (do a postmortem C-section), "finding" two babies, one of which is dead instantly, but the other is a perfectly healthy boy.
What happened to Immortan Joe's newborn son at the end of the movie?
I don't remember seeing him again and I don't think he was mentioned later. Did he die during the final battle?