That Monkey King script had some great ideas, but it just wasnt Indy there was a good idea then an abysmal idea. It was like Leonardo Di Vinci painting The Mona Lisa and then throwing manure over it!.
The ending should not have death in it in my opinion but something that brings the Indy Franchise to an (Symbolic or real end), because in five years time i do not want to be debating for an Indy V with harrision in it.
I dunno maybe the ending could just be Indy putting his fetora away or throwing it away, and then his son finds it and puts it in his pocket....
because i want to see Indy IV as the end of the adventures of Indiana Jones at least in the form that they are in at the moment, perhaps the franchise could be reborn with someone else playing Indy or the franchise reenvigorated by his son, but personally by the mid 50's it is not Indys world anymore, he by the 50's is a dinosaur.