A Gas Powered Games forum post spills the beans on the upcoming Supreme Commander: Forged Alliance, it's apparently a stand-alone expansion and features 15-20 hours of gameplay. Features over 110 news units, 80 of which are for the new faction, the Seraphim, once thought wiped out by xenophobic Humans.

There's lot's of other new stuff and the ship date is still November.

Thanks Voodoo Extreme