Dota 2 is getting a major patch this week with update 6.84. You can try out the changes in the Dota 2 Test Client now or wait for a couple of days until it's released for the main client. The change list is quite large, ranging from general tweaks and fixes to changes to specific heroes. A number of new items have also been added. For the full details read Valve's update notes
In addition, the compendium for this year's International will also become available this week, and Valve plans to reveal the teams invited to the tournament soon, so stay tuned.