Kyle Tucker would absolutely consider Toronto if the team is a contender and the money is right.
Nimmala is still probably 2 years away the minimum after this Season. And that's if everything goes extremely well. He just got to High-A Ball. He probably plays at least one full Season at New Hampshire.
But there's no guarantee either Bo or Nimmala stay at the position either. Bo has looked good at SS thus far. His market might force him to 2B. I think the Jays should do whatever they can to resign him. When you opened a large window of winning you don't really let one of your best players walk.
Plus Bo has made no indication he wants to leave. He's only ever said good things and has said he wanted to play with Vlad and one franchise forever. People speculating he doesn't like it here because he isn't smiling in the dugout has always been weird to me.