As this is their second year of this tour, I do not expect them to continue into 2020.
Also, a hiatus of 2-3 years at least is usual after a major album release.
From the recent interviews, I got the feeling that they still have fun making music together. I remain hopeful that there will be a 10th album* and another tour sooner or later.
*And Brotherhood 2 with EBW 11-20