He would have replace Damien Darhk in Season 4 instead.
Don't think that would work. He's too big for Arrow
The thing is that Vandal Savage was a main villain for Legends of Tomorrow and Vandal could not be in both (because of filming issues)
No, I think he's too powerful for Arrow.
If Darhk is powerful, Vandal Savage is three times more.
Vandal Savage is a villain more for Legends of Tomorrow/Flash than for Arrow
Well to be fair, Darhk was too overpowered for Arrow too.
What do you think?