Niantic Inc., the company behind the 2016 hit Pokémon Go, is in talks to sell its video-game business to Saudi Arabia-owned Scopely Inc., according to several people familiar with the discussions.A deal could be announced in coming weeks. The price being discussed is about $3.5 billion, according to one of the people. Any agreement would involve the Pokémon title as well as other mobile games, according to the people, who asked not to be identified because the discussions are private. There’s no...