AMD informed the media that it will launch a press conference on May the 31st. That will be held during Computex. Two things can happen, they will reiterate the Ryzen launch and also introduce the new 12 and 16-core parts.
More likely however is that they would announce Radeon RX Vega. During the press conference multiple there will be multiple spokes persons, indicating complicated architectures and technology. AMD-ceo Lisa Su will lead the conference. The email that was send clearly stipulates AMD Processors, so the HEDT 12 and 16 core platform might be launching or announced that day as well.
