A group of Starcraft modders are working on an unofficial sequel to Warcraft 3, aptly known as Warcraft: A New Dawn.
As reported by RPS, the goal is to turn Starcraft into "a breathtaking, lore-abiding storyline spanning several emotionally-gripping campaigns containing new units, new heroes, and new features as well as a fully fledged melee mode."
Pre-Alpha footage indicates there is an awful lot of work left to do, but also suggests the game is heading down the right track. Alliance and Horde unit selections are already visible, as are tech trees:
Will this project make it all the way? Previous attempts have failed, but we wish the team a great deal of luck.