Gamescom reveal rumours looking more likely following latest Valve announcement
Dota 2 will be delivered "soon" using the improved Steam download system detailed this weekend.
"Over time, more and more of the content on Steam will be delivered using this new system," Valve said. "Soon, Dota 2 will be delivered using it."
Evidence points to Valve revealing DotA 2 at Gamescom next month, with the event's official website listing the Portal maker as an exhibitor due to show off a "strategy" game.
Last October, Valve confirmed plans to launch the sequel to the popular Warcraft 3 mod Defence of the Ancients for PC and Mac some time this year.
The company has said of the game: "Dota 2 promises to take the unique blend of online RTS and RPG action that has made Dota popular with tens of millions of gamers and expand upon it in every way."