Thanks. Yes, it's a lot of work and won't be finished anytime soon. And it's both an idea and I'm working on it personally. I've done a number of things already. The basic map is ready (though naked and needs some cleaning up), the basic Roman unit list is pretty much done, certain units, models and assets have been touched as well, though all are not final.
Here are some WIP pics of some older stuff. Nearly everything has been retouched (new things added, textures updated etc.), but it gives you a clue as to what I'm aiming for.
Btw, the Rusichi team and the Roma Surrectum team deserve some credit for some of the textures used in this version, which were used as a base to work from.
Also, I'm playing with the thought of making Galerius function as a pope seated in Nicomedia since he was the most senior emperor in the East (together with Maximinus Daia in Antioch) and acting as the protector of the Tetrarchy. I hope it's possible to have the Kalmar Union script working on the papal faction. So once he's dead, Nicomedia will turn to Maximinus and there would be little restrictions to attack other Roman factions (no pope threatening you with excommunications anymore). But this remains to be seen.