So I was slightly disappointed that the AI could have unique terran units in WoL, but not zerg or protoss. But I was wrong! According to SC wiki, Hunter Killers (enhanced hydralisks) were in SC2; they just looked near identical to hydras. Makes me wonder what other hero units there would be...time to start a new campaign...
I think the Hunter Killers were scripted, not AI-produced. IIRC, they only showed up to escort Kerrigan
yeah, but that's good enough for me. The other races seemed so run of mill compared to terran on hard who had all these mercs.