I think it's a good opening!
I like the title on the flag. And I think it is overall a much better opening for an Indy Movie. (tough I really like the car "chase" opening too.)
But one thing needs to be take care of: not to use the "directed by steven spielberg" that appears right before the "nevada 57". Then we could put the names of the actors when we see them for the first time (maybe it will be shown in your next pictures?). And only after that "directed by..."
Looking forward the next pictures! :)