I've recently seen the sticker art for the purple Roman army and wanted to report a "nice touch" that is being included... if players do own the rest of the system (likely most purchasers) and want to do a side shuffle of sorts.

The victory banners here are Roman eagles, with a gray background.

If you remember, the base game Roman VBs had a red background. The Red Romans of RvB had VBs with a purple background. By giving a gray background VB to the purple Romans, those who wish for a little more literal alignment can swap VBs around in their armies-- so that each Roman army has VBs of it's own particular army background color.

Base Game Rome vs Carthaginian
Expansion 2 Rome vs Barbarian
Expansion 4 Imperial Roman	PURPLE BLOCKS	Eagle + Grey Backgound

Base Game Rome vs Carthaginian		Eagle + Grey Backgound
Expansion 2 Rome vs Barbarian
Expansion 4 Imperial Roman	PURPLE BLOCKS

That's nice under any circumstances, but might be particularly nice if you're doing RCW type battles with two Roman armies fighting each other.