https://www.gamespot.com/articles/diablos-deckard-cain-is-the-new-playable-character/1100-6457989/

If you've ever played Diablo, you know the name Deckard Cain. The weathered old man generally serves as an adviser, rather than any sort of combatant, yet he's set to become just that in Blizzard's Heroes of the Storm.

"He's this big iconic character from Diablo, and he's not someone you'd expect to see fighting, but he's the face of it in a lot of ways," lead hero designer Matt Villers told GameSpot. "In the Diablo III opening cinematic he's right there, and we thought it would be really cool to have him added in. We saw an opportunity to make him work and make him feel like he can stand shoulder to shoulder with Thrall and these other characters. We really wanted to tackle that challenge and it was a lot of fun."