Ok, I finally got some times for some pics:
The manuals look very different from the copies I own, and they even have extra pages and such. One page has a rabbit called "Professor Playor", and he gives you some gameplay tips. I don't know if these manuals are a variant/different region, or they are actually prototype manuals?
The front of each box has a torn excerpt from some kind of catalog guide for Sega(these being Choplifter and Fantasy Zone.) The underside of the advertisements on the front of the boxes both talk about Black Belt, and what it's going to be like when it comes out.
Lastly the game cartridge labels aren't slick, and are more like ancient printer paper. They are very rough feeling. Maybe they were even cut out and glued on by hand?
I need to pop these in and play them, see if anything interesting comes up!