yeah...but I'm pretty sure that there will be also some very good players, since Japanese and Korean Pro leagues will stop for sure...
the main problem is with American (and European) teams since MLB will never allow their players to play in Tokyo (the funny situation is that the qualification tournament -in early 2020) probably will be played with some MLB stars, meanwhile there's no chance to watch them in Tokyo (I can imagine Italy qualifying at the expense of the Netherlands because they make a team with people like Rizzo, Benintendi, Iannetta, Cervelli, Gallo, Nimmo, Conforto and so on and then going to the Olympics with the same team we normally see at the European Champs )...