Fantastic scenario! 
My current game (Survivors) seems to be going well. I was more cautious with the Main Characters than the first time I played, and that's paying off; I took the Graveyard, Fast Food Joint and Factory without losing any of my original Buildings or Main Characters. The Authorities and Company seem to be holding their own fairly well too - which hems in my own expansion, but also holds back the Zombies. I think City Hall is about to fall.
I have Barricades and Generators at all my Buildings... now building up my forces (Badasses and Chainsaw Maniacs to come with my MCs) for the big push.
My only constructive criticisms repeat what others have said - give the Company and Authorities the ability to build some unit from the start, and I like the idea of the Authorities having some sort of tank unit. But I'm still researching how to build Survivor tanks anyway.
Anyway, hilarious scenario, and a good break from my work.

My current game (Survivors) seems to be going well. I was more cautious with the Main Characters than the first time I played, and that's paying off; I took the Graveyard, Fast Food Joint and Factory without losing any of my original Buildings or Main Characters. The Authorities and Company seem to be holding their own fairly well too - which hems in my own expansion, but also holds back the Zombies. I think City Hall is about to fall.
I have Barricades and Generators at all my Buildings... now building up my forces (Badasses and Chainsaw Maniacs to come with my MCs) for the big push.
My only constructive criticisms repeat what others have said - give the Company and Authorities the ability to build some unit from the start, and I like the idea of the Authorities having some sort of tank unit. But I'm still researching how to build Survivor tanks anyway.
Anyway, hilarious scenario, and a good break from my work.