I would love to see asynchronous multiplayer. Let me explain with a story. In college my brother and I were in love with Advance Wars. We were separated by distance, though. We would chat about the single player, but we had no real way to play together. My brother (a computer science major) took matters into his own hands and created a hacked ROM of Advance Wars we could email each other back and forth. He would make his move, and email me the ROM. I would make my move over the next day or so, and email it back. A single match could take weeks! It really increased the value of your turn. You'd think about it for days planning and hoping. We had so much fun. I'd love to see something similar in War Groove. You'd take your turn, and then it would ping your friend with a notification. They could take their turn whenever it was convenient for them.