Like Many Members, It Depends On The Version Exclusive Plus Other Information. But For Now, Based On The Information We Have Plus The Emblem-I Think Sword Have My Vote For Now.
I'm going with Pokémon Shield ...even though my sisters got this system where one buys one game and the other buys another and since its on the switch I'll be able to play their games so I don't really have a choice on the matter xD