MY guess is, IF they are indeed revealing something. Cohh will open up with his intro talk a little bit about missing Pantheon and hes been excited and that this is a special video. Followed by him playing a video of this picture (assuming its just a frame from a paused video) and it slowly just pans in to reveal Project Farethale completed or at least close to complete.
Rest of the video will be them running around PF showing off everything they've done thus far.
Just my prediction on it.
i know what this is. it's syronai casting her ultimate spell that transformed the dark myr to have a lung.
if you look at the outline at the 10 o'clock position, there is a faint outline of a dark myr face with a crown or tiara.
this is just a teaser for the dark myr models >.>