The Nintendo Switch Sports isn't just an updated version of Wii Sports, but it's inspired by it. It packs much more than Wii Sports in it.
Nintendo Switch Sports Hands-on Preview: So Faithful To Wii Sports That I Nearly Broke a TV - IGN
Nintendo Switch Sports for Nintendo Switch - Nintendo Official Site
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Gachami Win vs Gachahiko Lose at Chambara in Gachaga Champ and Nintendo Switch Sports for Nintendo Switch : r/NintendoSwitchSports
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Wii Sports is coming to the Nintendo Switch - CNET