the new advanced barracks would be assassins... though it looks like an evolution of the barbarian barrracks... let's wait and see...
PS: To the devs: thank you for creating one of the most balanced and addictive games i've ever played
it's really fun to always have a bit of extra difficulty but seeing it CAN be done, it gives you that extra bit of will to try it "just on e more time". i hope KR2 will be the same