I think your "MoM" mission is a great idea, but I also agree that using the AvA for it is even better.
Think of it as an even far more realistic when plane sets are historic (actual), map is historic (actual) and run them with arena moderators just like FSO.
One of the problems with FSO, and it's impossible to please everyone, is the start time. Many Central and Eastern Time Zone players have put in a tough week and are pretty bleary-eyed by 2200/2300 local. Many European players are shut out entirely. An earlier start time would mean those who normally miss out on FSO could easily make AvA MoM's. Think about it...some 500+ players regularly participate in FSO and really look forward to the "as close as we'll ever get" realism. If folks had that same feel and organization at an earlier time, even more people would probably want to participate.
I'm sure that if you got some folks together from all sides (not just bish) to help organize and get AH Staff to help with the maps, timing and mod (blue text) permissions it could morph into something extremely cool like FSO is. Other than that, it's simply one side in LW MA getting 60 or 70 extra guys and pounding the snot out of some other side doesn't really prove anything. FSO style missions with coordinated offense and defence does. You can also probably get together with AH staff to get detailed after-event results so each side can tabulate their results and kills just like FSO. That would be SWEET!
With that in mind, you just might have the next BIG AH thing! Good luck!
ROX