Well, he's no Ars, but its pretty good.
He does seem a bit too light or bright to me. Obviously his horse should be white, but he doesn't really seem evil enough, at least when you don't look at his face. I think I'd probably make his armor a little darker and make his red clothes darker and purpler.
On the other hand, if he, like the first horseman in revelation, is taken to be a false savior (antichrist) then maybe he shouldn't look evil at all.
Is his tongue always out like that? It could be very nice if it flicker out from time to time, but riding around with his tongue out is just strange. It could also be cool if he had a very calm and kind looking face most of the time, which was animated to turn to that crazy evil face every once in a while.
I'm not sure what I think of the crown or his weapon. They look pretty cool, but are not really appropriate if you want his to match the the first Horseman in Revelation. The name Stephanos and the type of crown he is described as wearing in Revelation is definitely not the type of crown your model is wearing. To be more appropriate, it should probably be a Laural Wreath. Also, the weapon he uses should be a Bow--without arrows. It is usually believed that this symbolizes a tough but non-violent political rise to power. Of course, his popup's text seems to imply that Erebus's First Horseman isn't really like that.
If we do convince you to give him a bow, the Yersinia needs to carry a set of scales.
I too had overlooked the little people being hanged from the horse. Nice touch