I saw in another post that you character can show up in a cutscene, is this only for campaign or multiplayer? Does it even exist?

Hey, this is true. Your character will be in the cutscenes in both multiplayer and single player. There is only ever an 8 man squad and there will be 8 players per side if the server is full, so each player will me in. How it will choose each characters role im not sure, maybe the characters will only have a support role and the squad commander appears and takes the main role.

http://www.gamesas.com/index.php?/topic/1178654-can-you-talk-in-cut-scenes/
http://www.gamesas.com/index.php?/topic/1178369-whos-in-the-cut-scenes/

Thanks for the links Wraith. Let's use one of those.