What it does is takes you to the player vs player brawl part first, and only grabs an opponent from skill 50 or below. Once your skill gets to 50 it lets you go to the base camp where you can PVE or brawl some more.
When your skill is below 50 it gives you a massive bonus to win (ambush bonus) so that 9 times out of 10 you'll win, thus giving a soft introduction to play. That addresses what I thought might have been a problem - people get beaten at the start, then instantly leave.
Latter I'm going to tie it into the PVE part in that to get past each 100 points of brawl skill, you need to spend X power factor, which you get from completing PVE paragraphs of the storyline.
Anyway, I'll see how it goes. Thanks for the replies, everyone