User blog comment:KaiserLos24/New Shadow Isles Champion- Kalista (Maybe :P)/@comment-4290320-20141025082926/@comment-12049719-20141025085158

So in short, Hecarim betrayed his humanity :D

That's a really nice theory you got there. Considering how Azir and Xerath got lore updates, maybe we'll see somehting similar done with Hecarim's lore.