These could well be the last of the JP Arms Micron toys (the last two are listed as March 2013), as Hasbro has already stopped at theirs before the new Beast Hunters series.

Images of AM 27 (Ultra Magnus) & AM 29 (Shockwave)
Images of AM 28 (Leo Prime), AM 30 (Rumble - red), AM 31 (Frenzy - blue), AM 32 (Stunticon Wildrider - redeco of Wheeljack)
Details (no pics yet) of AM 33 (Darkest Megatron) & AM 34 (Jet Vehicon General)

Rumble & Frenzy appear to have the same mould and Micron. (Takara Tomy keep following the Gen1 toy colours, while Hasbro have now recently been following the Gen1 cartoon colours - it will be interesting to see what happens if Hasbro releases the MP Cassettes)
AM 28 was originally noted as Thundertron (the blue version Hasbro was releasing), but is now Leo Prime - so maybe Thundertron isn't being released in Japan now, like Kup (which was similarly changed in colour & character, and each country had one version but not both).

A refresher on what is still to come...

AM 22 - Dreadwing (Voyager)
AM 23 - Wheeljack
AM 24 - Cyrus Breakdown (Voyager)
AM 25 - Nemesis Prime (Voyager)
AM 26 - Smokescreen
AM 27 - Ultra Magnus (Voyager)
AM 28 - Leo Prime (Voyager)
AM 29 - Shockwave
AM 30 - Rumble (red)
AM 31 - Frenzy (blue)
AM 32 - Stunticon Wildrider
AM 33 - Darkest Megatron (Voyager)
AM 34 - Jet Vehicon General