I think it would be interesting if one faction (Bad Guys would be a good one for this) gets all their members eliminated from the tournament (or just decide to not take any risks). And invades the city to take it by force, and starts an all out war as the other factions respond in kind (turning it into a massive war).
Or the item is a thing of power but while powerful it can only some things but not others. Its the power over something. I will need to think more on what that something could be...
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We will never forget Dramos, our home world reduced to radioactive dust by tyrants demanding the blood of innocents. A lush world once filled with all sorts of life, the sounds of playing children, and buildings reaching to the sky is now a blackened lifeless rock. It is our duty to be the vengeance of the murdered. To rise to the stars and hunt down those who committed this vile crime. We will be the justice that rains down upon the heads of the corrupt Terran government that demanded the blood of innocent men, women, and children. We will never forget this crime and we will never allow the Dindrenzi people to forget. Our ships will ever be symbols of our revenge, and reminders of the fallen. We are the Rense System Navy.