Portnoy wrote the setlists by himself, he had a very complicated system for doing so too.
The summer tour before ADTOE had the same set every night, while the actual ADTOE had two different setlists that alternated. However they weren't extremely different, just a few songs rotated in and out.
Tonight's show is probably not an indicator for what will happen this year, but they didn't seem too interested in bringing back rotating setlists. So if anything it'll probably be an A/B set again.