The Activision Blizzard ATVI Q2 2020 event was held in August 4 at 1:30pm US Pacific Time. During the event, they announced that Diablo Immortal Alpha (internal test) is slated to start in the coming weeks.
It is confirmed that “internal test” refers to company-wide employee only testing. Up to this point, the game had been tested internally by the Diablo Team. It will open up to the entire Blizzard company: WoW team, Overwatch team, Classic Games team, and other umbrella teams: Texas, Ireland, Taiwan, China, Paris, etc.
Once that internal playtest ends, there will be steps for a Regional Test. Now, according to MrMesli, this means there won’t be a random pick of players. If the Regional Test started in India, and/or Brasil — everyone in those regions can participate.
A BlizzCon online stream is expected early 2021. BlizzCon 2020 was postponed due to COVID-19.
The system requirements for Diablo Immortal are yet unknown at the time of this posting, but it is a good idea to take a look at the system requirements of current Activision Blizzard mobile games as kind of a reference.
When I launched my iPad Pro (2018), I searched for a widely known mobile game in the Activision Blizzard portfolio: