According to Blizzard:

Warcraft III: Reign of Chaos & The Frozen Throne Patch Update

Now that the Diablo II 1.10 patch is available on Battle.net, the next Warcraft III update, patch 1.13, has gone into the final stages of testing. The patch will include many significant additions, including Acts II and III of the Orc Campaign, several new World Editor features, updates to many of the maps, and numerous balance adjustments. We expect it to be released in the next few weeks. Prior to the patch’s release, we will also be changing the lineup of maps currently available for ladder play.

In addition to the patch, we will also be releasing the art tools used for Warcraft III. These tools will allow advanced users to create and implement new art in the game, adding an unprecedented level of customization.

As always, we thank you for your patience and support.

[ post edited by GFraizer ]