Yeah the constructor is actually the Geneva-class envoy from SOTP. There probably wont be many "New" developments as we already have most of the assets from SOTP: Proper and are working to port many of the ships and stations into stellaris, however there are one or two new things we've been working on that may be exciting.
Those are the only images we've shared as the mod is relatively new... As well we're only planning to add the Covenant and UNSC as any other faction having a strong presence in space combat during the war time era doesnt make the most sense in lore atleast until post war. We dont have any plans for post war, but that may change as we develop more of SOTP proper. We hope to possibly expand the mod to include Forerunners as a fallen empire and the flood as an invasion event and maybe more eventually when we have more time to focus on the mod. However I would keep an eye out for it as we're hoping to reveal some developments pretty soon.