Problem is your still putting prices and the lure for competition, people will still fight even for pride. Competition isn't a problem either makes for more heated performances by teams.Carrying on with the 'staging it' idea, making sure all players throughout the day realise this is a promo for the sport, not a serious tourney would maybe encourage some risky (and to spectators - exciting) moves? so then there should be a bit more action all day, and most public will get to see it, rather than just the few who see the 'staged' game??
Just an idea!
The field layout will be what will show off peoples skills, if they have any.
Something the commentators will need to mention is play styles, similar to american football you have plays in paintball. Even though it maybe too complex for the average Joe to understand it still needs noting.
As long as you have the crowd understanding the basic principal, Team A has to push the button / score the flag in Team B's end and if they score 4 goals they win! And also getting the crowd to participate in terms of cheering for teams or players would indeed make it brilliant none the less.
Needed;
Observant/Whitty/Knowledgeable/Clear commentators,
Correct field layout,
Banners to show who's playing,
Player Names Clearly on their shirt,
Eye candy,
Information Points/ Leaflet handing out,
Something for the crowd to keep to remind them of the day.
I'm sure there a multiple other things. I like the theme tune idea.