The best idea I heard about continuing the Indiana Jones franchise is Short Round (played by Academy Award Winner Ke Huy Quan) stealing artifacts from Western museums to return them to their rightful people.
I thought about this setup but with Sallah's kids, he had so many that could team up and collect all the Egyptian artifacts in the British Museum during WWII since everyone else is distracted
Honestly with how good we have become are reproduction. Their is very little (I don't think any) that we need to keep the originals away from the county of origin.
Westerners will say "but those relics are safer with us, since your country is fucked" without a hint of self awareness about who fucked up these countries to begin with. And regardless of the situation in those countries, it is THEIR decision where their relics get to be kept safe, not the decision of the people who stole it.