From the announcement:
Firebrand is a Song of Blades-based fantasy wargame created by Towercap Games of Melbourne, Australia. $9.99 USD for the 50 pg pdf (no print option at the moment). Distributed by Ganesha Games.
Here are a few features:
Setting. Firebrand presents an unconventional fantasy world where nothing is as it seems. Take up the cause of one of four theocracies and fight for its patron demon's dominion, or join the ranks of the knights-hexer and protect humanity from its own saints.
Map-based campaigns. Firebrand introduces a map-based campaign where each region will provide the player with different benefits. For example, capturing a town with a knightly order will allow you to enlist heavy cavalry, a village with a college of magic will let you hire a mage, and so on.
Orders. A new system of orders allows soldiers to retain cohesion and act as a single unit on the battlefield. Heroes and soldiers alike fall in line to march, charge and fire volleys when ordered.
Siege equipment. Cut swathes in enemy ranks using catapults and ballistas, dig trenches to funnel your opponent into explosive traps and strengthen your spell-casters by bringing solar furnaces to the battlefield.
Detailed magic system. Wizards, necromancers and telepaths will join your company, bringing with them spells beyond those available to an ordinary mage. The wizard will rain fire and lightning from every direction using powers of teleportation. The necromancer brings your opponent's own soldiers back to life and places them under your control. The telepath subverts those yet living to your will.
As for all "Song of" games, the game is not tied to a particular scale.