I was actually having a comical talk about this with a few people at PAX. This years PAX felt like it was year of the Alpha/Pre-Alphas that felt close to release builds. I mean you had Dreadnought, Overwatch, Gigantic, and several more (and not at PAX you also have UT4). Boggled my mind because, to me, Pre-Alpha/Alphas are mostly rendered maps and characters with minimal texturing purposely because they're designed for harsh testing, implementing, and tweaking rather than polishing and fine tuning. Yet, all of these games felt incredibly solid and "Early Access" quality.
I actually haven't heard of any of those games lol. Though I might have heard of Overwatch, but I'm not that certain about that.
But yea,, considering it's current quality and continues show up at these big events, I personally don't think it'll take long before an announcement is given to the public regarding BETA.