Take a look at these scans. They are taken from the late Japanese magazine MSX-Fan of january 1990. SD-Snatcher is being presented here in the Coming Soon section.

As you can see, there have been quite some alterations when the game was released. All of this makes you wonder if this was a playable preview version of the game, or just some screenshots provided by Konami.
If this version actually exists, I would be very glad if you let me know at [email protected].