Snapfire, a gun toting, cookie baking, lizard riding, goblin grandma has been announced at this years International as the next hero being added to Dota 2
. From the reveal trailer, it appears that she is Timbersaw's aunt and possibly related to Batrider as well.
The cinematic reveal gave us a couple hints about possible abilities for Snapfire. She's shown helping Invoker by feeding him a cookie so she likely has some sort of ability to buff her teammates. The trailer also showed her shooting a shotgun and turret from her lizard mount. And lastly, the lizard shot a ball of lava from it's mouth that appeared to stick to and blind Timbersaw.
Early speculation is that Snapfire could be a hero for the support role. I think this is definitely a possibility, based on what was shown during the trailer.
Snapfire is currently scheduled for release, later this year, in fall 2019. And be sure to check out Valve's official cinematic trailer