Turtle Rock Teasing Something For Evolve [UPDATED] Evolve Going Free On PC, Beta Starting Tomorrow

Evolve developer Turtle Rock is teasing something on its website with a countdown that expires in 2 days. The only detail offered is the hashtag #StageUp on screen with the countdown. The official Evolve twitter doesn't mention the countdown, other than a retweeting a tweet from @TwitchTV_ProdX about the countdown. What do you think Turtle Rock is teasing ? Could it be a new stage for the game ? 

UPDATE 7/6/16 - Turtle Rock posted a letter on its Evolve forums announcing the PC version of Evolve will be free very soon. You can find the full letter here. In it, Turtle Rock co-founders Chris Ashton and Phil Robb reveal that Evolve is going free and a beta for the new free version of Evolve starts on July 7. The letter also says rewards will be available for those who bought the game at launch, and a number of big balancing changes and more. The game has already been pulled from Steam. The countdown that was teased is still going. There is more to this announcement, and we will have more details tomorrow.