Start trading away all those Dota 2 invites now--Valve's free-to-play MOBA will release this summer. PC Gamer reports that the invitation-only (in the same way that Sam's Club is an exclusive establishment) beta project will open up before the International tournament begins in August.
The only ways to get into Steam's most-played game at the moment are to buy an early-access pack, which come with a bunch of exclusive vanity items, or receive one of the plentiful beta invites which Valve gifts to current players. We can't imagine this announcement will be great for their market value.
PC Gamer says new heroes Abaddon and Legion Commander should hit the game around the same time as its release--bringing the sequel to just a half-dozen heroes short of the original DotA Allstars mod.