Looks like they were going for a really similar idea to the Crusade ellipsis transition with this whole young Indy prologue in the Spielberg/Koepp draft:
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Really wondering if this concept art is representative of the shots, or even the actual cut when the transition took place. Indy openings are action-packed, and so far these feel anything but. The whole situation and set design is also very reminiscent of videogames, particularly Uncharted, and looks a bit over the top for an Indiana Jones movie, let alone the beginning of one.
Then again, it was Spielberg. So there's gotta be some pretty strong narrative reasons behind these choices.
EDIT: Looks like I spoke too soon. The latest image Brockbank uploaded shows a MacGuffin and that leaves a bit more room for interpretation.
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A Buddha figurine, hidden within the third eye of a much larger statue. Interesting to note that in a previous illustration younger Indy was standing next to another Buddha statue with a damaged forehead. Considering Buddha's third eye represents wisdom, now the contrast between Indy at the youngest and oldest we've seen him in the movies makes more sense. He also seems to be damaging the site as a kid, while the context with older Indy looks like a proper archeological dig. Perhaps the angle they were going for with the story was a "with age comes wisdom" kind of look at the character's twilight years. Again, hard to say without a script, but it would be a fitting Spielbergian take on older Indy.
Not sure if anyone is even interested in all this here by the way... perhaps it's just the wrong forum. Or maybe there should be another thread focused on behind the scenes/storytelling for this movie as more material comes out. For me, it's an absolute treat that we're getting these at all.