Sounds awesome!
If you've ever watched Hunger Games, you would know how the people who run the games can edit the area, making actions/enemies. I like how you've implemented that, I suggest that the staff, similar to on the Hunger Games, can (along with spawning baddies) start said fires, add a feast, etc.

Great work by the way John, and everybody else working on this project, i'm sure it will be a big hit, like CTF was!