Imagine what God is capable of doing! He is just as powerful today as He has always been, and is ready to move on behalf of His children and in helping people come to know Him. It's important that your team and Churches start building an expectation of what God could do at your event.
"Oh, that You would rend the heavens and come down, that the mountains would tremble before You! As when fire sets twigs ablaze and causes water to boil, come down to make Your name known to Your enemies and cause the nations to quake before You! For when You did awesome things that we did not expect, You came down, and the mountains trembled before You. Since ancient times no one has heard, no ear has perceived, no eye has seen any God besides You, who acts on behalf of those who wait for Him."
ISAIAH 64:1-4 (NIV)