Some time ago someone posted a custom Thrawn character for Legion, including a template for unit, command and upgrade cards. Using this I have put together a few proxies for testing Bossk!
If anyone is interested in trying out this relentless reptile before he comes out, please post your findings.
(According to the stream after a unit with a poison token activates, it suffers 1 wound then you remove the poison. Med droids can remove the poison when using "treat".)
Based on zoom and enhance of the preview and the cards shown on FFG live stream.
There is a Bossk mini available for Imperial Assault. On a Legion base he stands as tall as a regular trooper.