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All things being equal, unfortunately yes. Pokemon Sword and Shield + dlc based on the pricing layout should be $90. Pic related is generally priced at $80 which includes dlc that I believe was $20.
That being said the most comparable example does show that original base game's value should lower in price due to age and being a "less complete" version. Pokemon Sword and Shield does not do this and that's where Gamefreak/Nintendo are taking some liberties on. The problem is these fringe examples aren't handle the same across the board. Nintendo digital store still charges the original Mario Plus Rabbids Kingdom Battle at $59.99. Gamestop charges full price too but they're also a pyramid scheme that profits more on used games so the used version goes for $10-20 cheaper at times. Amazon charges full price but often has sales like right now offering the original for half. Bestbuy and Target follows closer to Nintendo's ideology and charges full for the original BUT heavily discounts it during holiday. Then there's Walmart who somehow bucks the trend and will charge the original game $20-30 and the Gold Edition $50-60 because they have a completely different criteria to pricing.