Sorry Thenamir I'm afraid it's one team per person. If you'd like you still have unlimited trades till the tournament starts. A few friendlies have been posted in the other thread which may help in picking your final team.
Also, I think you're a bit off on your idea of what's actually going on. Your team won't really be playing, instead each player will be given individual points depending on how they perform in the matches they play for their teams in the actual World Cup.