My two cents worth...
Mission type: assault & defence ( well, sort of )
Island type:
3 big islands on same map ( like AEC ) where each side has a base island and the third neutral island has capture & hold points
Mission:
1. hold your own bases
2. capture hotspots on neutral island
3. capture enemys bases on their island
Requirements, ideas and thougt of problems:
- command structure ( COC, obviosly )
- someone has to be in command positionn all the time on each side
- commander assigning joining and respawning players to places which until then were controlled by ai
- it requires a lot of cpu since all the units are present from the start, the control of each unit can vary between human and ai
- ability to give a special squads special missions like sending special forces to enemy island to spot artillery targets(( infiltrate enemy island's western sector and find their hq for arty or air strike )), after that sending in planes to take it out
- needs a way to give orders in a memo type
- artillery would be nice but maybe since you can't find shelter from it