From one of the American online stores comes details of the next two JP Generations toys and the fourth GTR toy.

TFG-23 Metroplex
TFG-24 Legends Optimus/Roller & Bumblebee/Blazemaster (4-pack)

GTR-04 Maximus (with a Master Sword and Race Queen figurine)

Each are due out September at that site (which could mean late August in Japan), and there are some preliminary pics of each.

Maximus has the distinct blue and red of the Gen1 character/toy (even having the knee spikes painted like the red leg cannons of the original toy), but I wonder if there will be an explanation as to why they chose a mostly green colour scheme for it.