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How are they going to handle the existence of newer generation games in Let's Go? FRLG completely handwaves the existence of Johto and Hoenn until the Sevii Islands quest, which has references to Celio attempting to implement communications with the Hoenn region, and Silver being Giovanni's son. After 4 other gens, would more get added, or would all of it be cut for the sake of nostalgia?
Similarly, how are they going to handle all of the oddball dialogue and dex entries the games had? Like the Silph scientist talking about being sent to the Tiski Branch in Russia, or other references to real world locations.