It appears we have an answer, courtesy of Planet Iacon over on Facebook, who bring us the full list of the first releases of Power of the Prime by Takara Tomy - though yet unnamed and lacking images (the one used in the thumbnail is for illustrative purposes only) - with the PP code for every figure (much like UW for Unite Warriors, or LG for Legends)! Currently scheduled for a May 2018 release, we're bound to hear more about this in the coming months, as only three Prime Masters, three Legend class, one Deluxe and two Leaders are currently shown off. Check it out below!
Takara Transformers Power of Prime Series:
PP-01 Micronus, 800 Yen
PP-02 Liege Maximo, 800 Yen
PP-03 Vector Prime, 800 Yen
PP-04 Dinobot Slash, 1500 Yen
PP-05 Wind Charger, 1500 Yen
PP-06 Beach comber, 1500 Yen
PP-07 Autobot Jazz, 2800 Yen
PP-08 Rodimus Prime, 7000 Yen
PP-09 Optimus Prime, 7000 Yen
All scheduled to be released on May 2018