The next Indy should have...

I'd like to see him track down Excalibur.

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Indy should have a flat-earther sidekick and they would bust each other’s balls.

I’m totally up for him discovering a lost world in the vein of King Kong or The Land That Time Forgot.

. . . a vagina, and be played by Brie Larson.

A fistfight with Loki. Indy could poke him in the eyes, say "doink!" and then run off between his legs.

with indiana time traveling you might get dinosaurs