Look at the 2nd page of comments on http://youtube.com/watch?v=h4H2Uj8zoK0 and you'll see Medathos commenting about using your DS for HUD, map terrain, teammate positions, and voice over IP. Is this true? I hope so. Hey, this guy could be an anonymous EA/nintendo official randomly surfing youtube. He seems pretty confident with his statement.
Using DS to link with wii for voice chat and other stuff is an ingenious idea. I wonder why that function is so underused.
Medathos:There i sno split screen multiplayer, but there will be 32 player online with drop in drop out co-op play. for 2 teams of upto 16 players on ech, you will also use your DS for HUD, and map terrain, as well as your team mates positions, and use it as a Voice over IP, to comunicate with the rest of your team