BBTS have listed two more Gimmick toys for the Japanese Movie line - LA12 (One Step) Stinger, LA14 (Power Battler) Battle Attack Nemesis Prime (likely a black deco).
LA12 is noted as an August release, while LA14 has a September release. No idea on what or when the LA13 will be.

It is worth noting that the regular coloured Power Battler Optimus doesn't appear to be releasing in Japan, so the black version could be the only version of that mould there.
Stinger is likely to be the same as the Hasbro version.

BBTS have also given names to AD29 (Voyager Slog) and AD30 (Voyager Drift).
Not sure if they are just guessing based on them being Voyager price-points and the last two Autobots at Voyager price-points, or, if they now know for sure it is those two.

The identities of AD18 (Voyager Decepticon), AD19 (Deluxe Autobot) and AD28 (Deluxe Dinobot) are still unknown... but AD28 is likely to be Snarl.
Since Voyager Galvatron is supposed to be AD22, it is possible that AD18 could be a Nemesis version of the Voyager Optimus.