The thing is with PRISM, a re-release won't do ****. TD had a re-release while she still had #1 singles and booming popularity and status.
She could re-release, but she would get 1 more Top 5 hit at most. The interest for the era is gone.
The whole album from the beginning was mediocre in comparison, and was very limited in #1 hits.
The fact she actually thought Unconditionally & This Is How We Do could be singles shows this era didn't have much going.
The next era also won't be any bigger than PRISM.