RedTop this is how I understood what TOD was going to be. Basically it will be a large CO-OP multiplayer arena. Much like the SEA to an extent. Each side will have a mission to complete in each scenario.
Initially all plane sets involved in the mission will be AI controlled on both sides. Players can join either side and take over an AI slot in the mission. Each mission will have specific objectives that need to be accomplished. Fighters intercepting bombers and bombers hitting their respective targets. Winning the missions will be determined by the amount of targets/bombers/fighters nullified.
Basically you will have realistic style missions going on with escorts, fighter sweeps and bombers. The mission paths and goals will be preset kind of like a single player game and its missions. I believe it's going to be like a whole campaign thing but if it's going to follow historical events I'm not sure.