Overwatch is a massively popular team-based first-person shooter from Blizzard. Blizzard is the money-printing juggernaut of game developers that turns whatever they touch into gold. It's no surprise that they're adding Genji from Overwatch into their Blizzard All-Stars game Heroes of the Storm.
Genji, the cyborg ninja, joins the top-down fray with some new moves. His moves consist of Cyber Agility, Shurikens, Deflect, and Swift Strike. His Heroics include Dragonblade and X-Strike. An example of how he plays in the video below:
Hanamura is a large two-lane Battleground set within Shimada Castle from Overwatch. Heroes won't be able to directly assault the opponent's core, so victory must be achieved in another way. Making use of the map's mercenaries or taking down the Mega Enforcer boss is one way to do it, or escorting the Payload (but what do Overwatch players know about payloads?)
Lastly, there seems to be a new Zarya skin, as well as the Oni Genji skin. Pictured below. These additions should be expected when the big update Heroes 2.0 launches later this month.