Firefight has been an incredibly popular mode in Halo since its introduction. One thing that’s always felt a little shallow about Firefight, though, is how you were limited to the same maps over and over again. If 343i were to give us the tools to create our own maps in a future Halo title would you use it? Seeing how Forge has been advancing with games like Halo 5: Guardians I think the next logical step is to get AI working in some way.
I wouldn’t use it since I’m not a Forge person, but I know people have been wanting something for Warzone maps at least for a long time. I’m sure Firefight would be welcomed as well.