Konami confirms via E-Mail their Beta Test is beginning September 7th, 2016
Beta Testing will last two weeks.
They request any errors or bugs be reported to them, hence the point of beta testing.
Play Data from the Beta will be deleted. Data cannot be transferred. Any goods you pick up in the Beta will not carry over.
Souji from Duelist Groundz has been generous in providing screen caps from the game.
Of note, Sphere Kuriboh from Dimension of Chaos is in. Souji has also stated “Vylon Ohm” and “Contact with the Aqua Mirror” are in.