Wouldn't it be nice to have a small 'Battle' in SP?
It's kinda boring to fight against AIs all the time.
What if we could have a battle with other players online?

Scale

Well, it would be hard to have massive squadrons for a battle, but a small squadron which consists around 3~5 players for each sides wouldn't be too hard.

Missions

There would be several types of battle, for example, there would be an Aerial Dogfight, Tank battle, and Ship battles.

Mission objectives would be protect, intercepting, Deathmatch, Free for all, Capture point, assault, Dominate etc.

Each teams would have a squadron of vehicles and thier own bases.

AA guns would be controlled by AIs, other main vehicles would be mostly controlled by players.

Maps

There should be a new map for these battles since there aren't alot of land on current SP's default maps which limits the scale of the battle.

AI capabilities

AIs should be able to identify foe and friendly.
AI controlled AA turrets should be placed around places like airfields and attack incoming enemy vehicles with limited range.

Multiplayer

Multiplayer should have an option to turn off/on name tags for more realistic battles.
If the name tag was needed, it would be nice for the name tag to not be resized by distance and also display range too.

Other In game stuff which would be needed

Radar
It would be nice to have it on SP, because it is important for long range missions.
Maps
As mentioned before, we need better maps!!!
Mission type selector
It would be nice to have a option to select mission types such as an Deathmatch, Free for all, Capture point, assault, Dominate etc
Banning System
Banning people who are Trolling, such as exiting a ongoing battle, spamming in the chats, ramming, teamkilling etc
Chatting System
Communication is very important for missions so it would be nice to have a default chatting system and a voice chatting system too.