In the comics Genghis Khan was one of Vandal Savage’s previous identities. That goes back to his origin story in his early appearances. I wonder if the writers know that? It is interesting that the name “Vandal Savage” was never used. Unneeded it clear who he was. Funny how they glossed over his past motivations, including Hawkgirl, as unimportant. Though Nora was curious about a past girlfriend of Ray. I wonder if that sets up her return?
Vandal Savage is rumored to be in the Suicide Squad sequel. If they are restricted now, they could get around it using his other historical names like Genghis Khan.
It never would have occurred to me but I read someone compare Savage being friendly with Ray to an JLU episode. Where in the alternate future Savage feels remorse for destroying the world. So him and a time displaced Superman become wayward friends.