Based on the vague description at a Singapore online store, it sounds like the Weaponizer Bumblebee is going to be a ToysRUs exclusive in Japan.
The Weaponizer Optimus is to be a regular release, but with a special Matrix/sword, so this Bumblebee is also a bit of a fancy version, as it might be released in a gold colouring (perhaps like the CostCo Battle Ops Bumblebee).
Plus it will come with a Micron (at least one), and added ports to plug them into.

Scheduled for the end of this year, priced at 8,000yen (about AU$100)... which is about the same pricey amount of the Optimus figure.