Here's somethings that you can tell this is the Centaur champion.
Originally Posted by NeeksNaman
We here at Riot Games make every effort to ensure that our stable of champions is as diverse as possible. Still, even after the addition of Sejuani to the League of Legends, there are those cavalry enthusiasts out there who would contend that the greatest warriors ride horses. For you purists, we’d like to propose an alternative point of view. It is our opinion that the most epic warriors are themselves at least 50% equine. And as evidence of this theory it is our pleasure to present Hecarim, the Shadow of War.
[aws2=news/April_2012/2012_04_03_hecarim_teaser/Hecarim MiniSplash.jpg]news/April_2012/2012_04_03_hecarim_teaser/Hecarim MiniSplash_thumb.jpg[/aws2]
So if you enjoy leveling your lance and charging headlong into the brunt of the enemy ranks leaving only the trampled corpses of lesser foes in your wake, we’re pretty sure that Hecarim, the Shadow of War will have you chomping at the bit come next patch!
There's also a horse footprint in the picture.
I hope there's a skin that makes him look like either War's horse or Shadowmere.