Pokemon Let’s Go hasn’t been out for too long, but there has already been hints at possible sequels for the franchise, this is gained after gathering information from an NPC that seems to hints at something in that region soon.
When you challenge Sabrina – the leader of Saffron City gym – a second time, she mentions “I won’t encounter another trainer like you for another three years”.
Generation 2 happened three years after Generation 1 in the Pokemon universe – a fact constantly bought up in the Gold, Silver and Crystal games. A reference this specific, from a leader with ‘psychic powers’ seems to tease that we’ll see a sequel to the game in three years’ time.
After all, in the Johto games, you can go back and battle leaders from the Kanto region, making Sabrina’s premonition quite accurate.