There isn't much of the year left to release it in any way, but Digital Extremes has finally confirmed (roughly) when you'll be able to play Warframe 1999.
By now you had a 50/50 chance at guessing when Warframe 1999 would be releasing this year, and if you guessed December, you don't win anything, but you would be right
Source: VG247 (opens in a new tab)