When using the Pekka skin on the Barbarian King, it would be cool to see mini Pekkas come out when hitting the Rage. Or if you have the skeleton skin going, the rage would spawn skeletons.

Same thing for the Valk skin with the Archer Queen. She would spawn valkeries

I sure people who didnt get those skins would probably poo-poo the idea, but im saying the spawned troops would have the same abilities as the spawned barbarians or archers. It would be just a cool graphical change. No real tactical advantage.