UPDATE: It's official - Hanzo and Alexstrasza are coming to Heroes of the Storm. Alexstrasza can transform into a dragon, and Hanzo can be a nimble scout assassin.
Blizzard also announced a raft of changes coming to HOTS in the 2018 gameplay update: performanced-based matchmaking, voice chat, a new camera, laning improvements, a stealth rework and evolved battleground mechanics.
ORIGINAL STORY: There's been a BlizzCon 2017 leak ahead of the opening ceremony this evening. Overwatch character Hanzo, and World of Warcraft dragon lady Alexstrasza, are heading to Heroes of the Storm, according the a screenshot of the Chinese HOTS website on ResetEra.
Hanzo's arrival means you will never have to play as another hero again, regardless of what your team needs. Remember, a Hanzo main is all you need.
Hanzo is a ranged bow-using ninja whose ultimate ability, in Overwatch, summons a phantasmal dragon which drains the health of all enemies it passes through.
He's far from the first Overwatch character to be brought into Blizzard's MOBA. He joins his brother Genji as well as Junkrat, Ana, D. Va, Lucio, Zarya and Tracer in the game. It feels like it's only a matter of time before Blizzard brings the entire Overwatch roster over.
Alexstrasza, meanwhile, joins other dragon-humanoid WoW character Chromie in HOTS.