It will be a sequel For Warcraft 3, named “Warcraft, a new Dawn” and is using the Starcraft 2 graphic engine.
The developers are some fans, this sequel for Warcraft 3 has nothing to do with Blizzard.
The work on the game has just begun as we can see on their blog. All we have is a cinematic trailer that is using the Starcraft 2 engine and a gameplay video. The gameplay video is actually showing a 1v1 game between two horde players.
We can see the custom made orc buildings and units.