well 4 and 5 are definately Ocelot(or Liquid, doesnt really matter) and Snake.

3. for some odd reason(to me) looks like Raiden.....but who would want him in a game again haha...yeah(its the sword that makes me think that)

6 may be Otacon and it probably is seeing how he hasnt been brutally killed yet.

I'll figue out who the hell the other people are later

and Kojima is Krazy(with a K b/c of that video trailer)