New Heroes to be added after TI2
The Dota 2 main client has recently had an update with three new Heroes. This is the latest addition of Heroes, at least until The International 2 finished as mentioned in a blogpost by Valve.
With The International arriving in just over a month, we want to give the competing teams some time to practice with a stable Hero roster, and as few new bugs from us as possible. With that in mind, after today’s update we’ll be clamping things down a tad, focusing on getting the existing feature and hero set polished to a high sheen. Fear not, we will continue to work on new heroes internally, getting them ready for a release once The International is over.
Sources: Dota 2 Blogspot