I can imagine using Abathur's Ultimate evolution alongside Slivans chimera (And add in Slivans 20th-level talent, hydra because why not) to make an army of Slivans. ALL THE CREEPERS! BTW since towers and keeps don't have ammo anymore, Corrosive Bile is useless.

I imagine it would be awkward on blackhearts bay with a duplicate of him... that would be interesting.

Very interesting concept, I can imagine his town hall being combined with the overmind concept and making the enemy team too scared to so much as touch the lanes. XD Although I wonder why you put such a long cooldown to Trained militia? I know he isn't mean't to become a battle character ALWAYS, but it seems like it isn't very interesting/impactful compared to the town hall, especially for something that has a 2 minute cooldown. Maybe make it so he has a few (2-4 or maybe more)...