For anyone who might be wondering...
Quote ="RFL"The annual clash between the First Utility Super League and NRL Telstra Premiership will involve the First Utility Super League Champions, the First Utility Super League League Leaders Shield Winners and the Ladbrokes Challenge Cup Winners.
If a Super League club was to win two of the three trophies this season then the third World Club Series place would go to the First Utility Super League runners up.'"
They haven't said who will qualify if Leeds win all 3 trophies, which is more than likely.
Super League runners up is mentioned, but the other place could go to the Grand Final loser, or maybe the Challenge Cup loser.
Of course, the Super League runner up could also be the Grand Final loser, so...............