I had an insane plan to create alternate sculpts for the minions if this project really takes off and we run out of stretch goals. I've got a plan for each of them and they would be super fun to concept. Let's try to make that happen!
Alternate sculpts would be great (and I'll bet you have some great ideas in mind!), but I'd certainly consider adding more of the existing ones to get some hordes of broo, scorpionmen, etc.