I may not be much help in the way of battle strategy and game planning, but I would offer spiritual support and motivation. I would teach them what they already know, what they have already done and proven. I would tell them to believe in themselves, for it matters not if someone else believes, they must believe it themselves.
I would show them highlights of this season. Every step, every moment of this journey that has led them here. To this moment. Everything they have fought for, have overcome, has led them here. They never gave up all this season long, not for one moment. Always believe, always have faith. There is nothing they cannot do, for they had the power within them all along. They were never without it. Now they stand on the brink of dawning glory, of which knows no bounds.
This would kind of be my motivation speech or something very much like it. Believe. Prevail. The might of the Pack.