Cont. But people would only care about their national team and hence: 1. Their NT would need to be somewhat competitive and 2. People still wouldn't care much for MLB because they would rather watch their own domestic cricket leagues like the IPL and BBL. It could work though
If Taiwan/Korea with Wang/Kang/etc. are any indication, fans will follow their favorite players (who sometimes make their names in the domestic leagues) and support whichever MLB team they play for. Ultimately though, if it's about growing baseball, whether they follow the MLB or domestic league doesn't matter.