I like the idea of sigfigs, but I think they could be made more unique from regular Heroes. I'd spin something off the idea that they are the physical manifestation of the actual player in charge, so they might have some amazing power but there'd also be some extreme consequence if they're killed. Like the whole army loses a turn, or runs around in confusion, etc. Remember what happened to the Imperial forces in Return of the Jedi when the emperor bit it? Suddenly these elite forces started getting beat up by ewoks and crashing super star destroyers into death stars and all kinds of retardedness, all because the player controlling them got killed.