I had made up Horror Rating rules for fighting aliens and monsters.
Ammo clip rules to count how many shots a person could do and how much a person could carry.
Hit locations and armour area rules,a few new skills and feats, lots of vehicle equipment and device add-ons.
Military ranks and pp for monthly pays and a command like feel.
Black market selling of equipment to gain more pp or stripping vehicles to add to ones own, free of charge.
Injesting of crystals to gain power points for powers was other areas i was looking at, however i had never given the aircraft/vehicle rules much thought.
God looking back at this all now thank god i never released it
and Im still trying to get my head around 3rd edition.
Wish they had got marvels license as well though. Oh well maybe some of the other comic companies might jump onto Mutants and Masterminds system.