Many Atlanta Braves fans have expressed their displeasure with the idea of the DH tainting the hallowed grounds of the senior circuit, but I believe after we get a taste of it this season there will be no going back.
The current collective bargaining agreement between the players and the league expires in December of 2021. I don't know if they would/could amend it to keep it next year, but my belief is that once the National League gets an extended look at their teams with a DH in use, fans will wish to keep it.