See, here's the thing. A lot of the cool new units that are going to feature in TT rely on the TT combat engine for their capabilities. Mentalists for instance, would be quite difficult to code into TSoG at this point except as regular psy fighters that have feedback. Cavalry, also, would be difficult to add due to the small size of the maps and their ability to continue moving after an attack. The TSoG engine really isn't designed for that. Lizardmen are a possibility, but I'm going to focus first and foremost on factions that don't require me to create lots of new assets/AI.