https://twitter.com/kissyouji_kaito/status/532190172406751232
Left side on the pic is the early image(wood prototype w/ photo edit) of Micro Change Casette Man, designed by Shinji Aramaki.
right side - product version design touch up is by Kisshouji Kaito, former Takara emproyee and who tweeted this info.

see more(in Japanese):
https://twitter.com/kissyouji_kaito

 

I'm very sure I've seen this before.

EDIT: Yup, from an old catalog posted here over a decade ago:
Microman



Also, the image on the right is simply the package art used for the MicroChange and the Transformers version.



So while I'm sure a lot of people may never have seen this before, I'm afraid it's not really groundbreaking "news".