If any game developer should make a Dota game, it would be Valve. The games as a service model that they've adopted just works effortlessly with a highly competitive multiplayer game. Looking at the current state of this game is just what it's going to be like on the initial release. Considering that they've stated that this game is going to be given the "Team Fortress 2 treatment", we can expect this game to evolve from "DotA with a fresh coat of paint." Plus, IceFrog, the designer of this game and the DotA lead since the departure of Guinsoo and that other guy that I could care less about, pretty much turned DotA into an e-sport due to the insane balance that he gave the game.
Valve has this fecal matter in the bag.