With all the criticism of the rear end styling of the Gen 4 Prius. Will the rear end treatment on the 2017 Prius Prime be the new look of the 2018 Prius in an early March or April 2017 release?
No. They would likely change lens design for 2018, but doubt any reshaping of Prius rear. 2022 all new Prius, that'll be different rear end.
I doubt they introduced essentially 2 designs at the same time to then put one of them to the other - I think they want to keep designs separate for differentiation