This is not made by Blizzard, it's an unofficial project made by a group of guys. So apparently, some guys are trying to create a Warcraft 4, a sequel to WC3: The Frozen Throne. They will create a campaign following the events after TFT happened, as if the WoW lore never existed. It seems pretty legit at the moment. However, it will not run on the WC3 engine or anything new, it is a mod for Starcraft 2, and it'll run on the SC2: HoTS engine. That being said, you'll need Heart of The Swarm to access this. Here's a video of the pre-alpha: And here's an article wrote by PC Gamer. Thoughts?