That would be next winter for me (AUSTRALIA!)
It's easier for the community to make an AoR than the game devs, mainly because the game devs have to make all the unit parts, texture them, make them compatible with the game, add the units in, and make some UI for the unit.
The community can just copy what CA has done, but just change it slightly to get a new unit.
in my opinion, CA should spend their time on more important things like the games central features, I'm fine with the community taking care of things like this.