If the game gets patched to a point where most of us would consider it complete, and the Battle of Moscow scenario pans out, I think that the next addition should have US planes to continue the spread of theaters and draw in the crowd.

Battle of Britain first made sense since it's a smallish map, not too many planes to make the scenario complete, and there is a general interest in North America, Europe and Russia (three biggest flight sim markets).

Battle of Moscow at this point makes sense since the only market that's willing to keep giving Maddox Games their money is the Russian one.

If they move on to a campaign that has a sufficient number of US planes, then they will be able to draw North America back into the customer pool. They would probably avoid the pacific since the amount of maps, and ship models would be staggering to get anywhere near being acceptable. So possibly a North Africa/Fortress Europe scenario.

The name of the Game at this point is #1. Get the bloody thing to work. and #2. Get some money. They're going to have to go for the widest possible audience they can, and Moscow or the Med isn't going to be enough.