Blizzard's Next Cross-Game Promotion Involves Overwatch and Heroes of the Storm
Blizzard had done some cross-game promotions before such as playing World of Warcraft to unlock exclusive Hearthstone heroes, purchasing Overwatch to get new mount in Heroes of the Storm, and so on. The next one, announced at BlizzCon 2016, is playing Heroes of the Storm to unlock exclusive skin, spray, and player icon in Overwatch.
The new Overwatch skin you can unlock is "Oni" skin for Genji, one of the most popular heroes in the game. To get this skin, you have to complete 15 games in