You will be able to construct hero characters and research upgrades like population cap boost, build time reduction, etc.. (thetech52.com)
The single player demo contains the game tutorial, two campaign missions, one sandbox scenario, and a modest population cap of 500 Tropicans. (rectifygaming.com)
They're also releasing «Definitive Editions» for the earlier games, complete with 4K graphics, expanded fields of view, and increased population caps. (waypoint.vice.com)