I have rog 2 trencent version with fingerprint ww.
I am in AUS and purchased a twindock 2 for Aus $399.
The pricing for accessories are way to much and perhaps with the release of Rog Phone 3 you may want to factor that in.
The Nintendo switch, PS4 etc are cheaper than one of your accessories let alone all.. I do love this phone and owned rog 1 aswell but if next version isn't including some accessories at good price Asus won't be able to compete with handheld gaming as I will just buy another switch or a android device just for emulation with controls built in. Hope you at Asus think of this. I will be returning my twinview dock as doesnt allow apps to fullscreen (like LGs etc) and keyboard on bottom screen. Waste of $399 aus