It turns out that the 'Strange Relic' treasure from Uncharted is actually a Precursor Orb from the Jak & Daxter universe. The orb has some unique markings on it that, when translated, say "Naughty Dog" and "Manmad".
A quick Google search will teach you that Manmad is a city in India, so perhaps that's where the next game will take place.
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