VideoCardz picked up word that PowerColor will introduce a Radeon RX Vega 56 Nano Edition card at Computex 2018. As the site points out, this is not the "Radeon RX Vega Nano", but a custom project from PowerColor.
No technical details were announced, but a new picture was released. We can see two power connectors (8+6pin) which are a standard for RX Vega 56. Such a short PCB is not unique to this particular model, but only PowerColor managed to fit a single-fan cooling solution and keep the card smaller in the process.
The card on the photo below looks rather bland, it's unknown whether the final production model will look more appealing.