Originally Posted by Attila the Professor
Well, it doesn't need to be Indy. Could be a companion, could be a bad guy, could be a long-trapped and newly discovered corpse...an underwater Heimdall.
Suddenly stepping over a face staring up from the ice! Creepy.
Like the corpses in Tolkien's Dead Marshes.
A twist would be for Indy's companion to be trapped, and Indy actually fail
to rescue them. If it was later in the movie, with the character already established, that would have come as a surprise.
Then Indy would be questioning his abilities and the danger he poses to those who follow him on his crazy journeys. A set up for Indy to redeem himself heroically and strike a blow for the older generation.