Well, Legend is all the ideas I, or other people had before, but was either too lazy to do, or it would have been too difficult.
There will be multiple overworlds, because there will be multiple planets. You'll have to fly to them.
There will be nations controlling certain planets, or parts of others. There wil be fights to take control of a moon. I'd love to see if it was possible to make a 'global' map, basically, it loops around like it's wrapped around a sphere. But I don't think its posible.
I plan to make so many vehicles, a huge overworld, where you can go below ground, above it, over the sea, flying, or even going into space. Shooting down an enemy plane, blowing up enemy fortresses with a gps guided nuclear missile. Break into space stations owned by the enemy, etc. Eatch 'match' would last a few weeks, giving time for a lot to happen.
I after the matches, any changes (like one nation took over a moon, or stole a supply of missiles) they will keep them even in the next match. Players would be stuck on the team the whole time, however I will allow requests to switch if there's any problems (Mystic, you and I wouldn't be on the same team

). If he teams get unequal, then I'd switch it around a bit. You'd have to buy replacement tanks, planes, etc for your team. I plan to make it very realistic, and it will take some strategy, and of course, skill.
As for the exp system, I don't think it's going to be extreme. There won't be a huge difference from a noobs stats, and a Legend's stats (Legend=highest rank).
I want there to be some nation loyalty, but also a competition for most kills, hghest rank, etc. I think with all the ways you can play, it's going to be really awesome