Ok, let's go over what we know so far. First, "IceFrog", the lead developer of the popular Warcraft III mod Defense of the Ancients announces nearly a year ago he has been hired by Valve to lead a team on an unnamed project. In late April 2010 he states that an announcement of what he would be working on would be made "soon".

Fast forward to a few days ago when a Twitter post by voice actor John St. John (since deleted) revealed he had been working with Valve "recording for DotA." Now comes word that Valve has applied for a trademark for the term "DOTA". The trademark application was filed only yesterday which has many speculating that Valve may be making an announcement in the very near future.

[Via superannuation]