Ok...I have some suggestions: Olympic Fanfare and theme, Summon the Heroes, Bugler's Dream. All these are olympic fanfares and are very common in events. I'm from a concert band, we use such fanfares during major school events. There are other entrance fanfares but the above i mentioned are the most available ones...all from John Williams.
John Williams doesn't have much fanfares from indiana jones. I'm a personal fan of him, so i dare say the olympic fanfares are the most suitable.