Dota 2 in some form much sooner than originally intended. "We're going to take the current version of Dota 2, which has The International set of heroes, and get it out there as fast as we can," project lead Abdul "Icefrog" Ismail said in a Dota 2 blog post.
The team had originally planned on "adding new features and slowly growing the number of heroes until we reached a level of parity with Dota 1" before launching the pseudo-sequel, but is moving the launch up in order to satisfy player demand. Regular post-launch updates are still planned.
Icefrog additionally notes that the game will remain "invite only" for the time being, though he's hoping to minimize that period. It's still unclear whether Dota 2 will launch as a free-to-play title like competitor League of Legends, but it seems we'll find out much sooner than later.