I would set it up with a professor finishing his retirement lecture. A class full of students, former students, colleagues that celebrate him. The point of view is behind his shoulders. We see him talking and receiving a round of applause. The music is sad and solemn. As he exits the huge classroom we follow him to his study. We see his silhouette from the frosted glass door. He takes his hat and we immediately recognize him for who he was and for what maybe is no more: adventure.
Only he's not Indy, because the camera pans to his door name holder and the name is the one of Dr. Herman Mueller, Medieval History Professor, who true fans will recognize as Indy's old boy scout friend.
The card fades into his military name patch. It's 1943 and he's in a small French castle yard. Everything is in very bad shape, a turret is partially collapsed. A truck is ready to leave.
He's nervous, the enemy is closing in.
"Where is he?! Where is he?!"
"There's no time, we have to leave NOW!", the driver shouts in a French accent.
He reluctantly jumps in, the truck skips through the courtyard wheels raising a cloud of dust, but they discover the nazis have control of the gate and shoot them ("putain! Shouts the driver). They dodge the fire but can only run and continue circling the castle, but they will soon be again at gunpoint, and the Nazis know that. They are ready to shoot again. Suddenly, bombs set off at the gate sending the nazis airborne (cue Wilhelm scream or is it too tacky?).
A familiar silhouette appears in the dust from the explosion, from the top of a boundary wall. Indy theme plays, he whips his way down hanging from what's left of that turret gun and jumps in as the truck approaches.
"WHAT TOOK YOU SO LONG?", says Herman.
"A thank you is enough, Herman. LET'S GO!".
Herman looks at Indy in admiration, he has always been and hero to him, and always will be. He looks at Indy's hat and we understand how much of an insipiration Indy is for him, but really for every good person he crosses paths with.
Camera travels to reveal that the two were saving medieval artifacts from the castle collection. The truck runs fast, but the next challenge will reveal itself soon, for the prologue to start.