In the past few years, the user @Suddendesu was able to archive a bunch of magazines called 'SEGA Harmony' - known for having the artwork on the covers that we'd later see in Sonic The Screen Saver.
I have now gone through each of their archived versions, and extracted and cleaned up any photos from these issues.
They're all available here: https://archive.org/details/@zanmai0101?query=Harmony
Some cool things in these - a 'Sonic Magical Train' which appeared at a Joyopolis! And a lot of photos of Michael Jackson appearing at SEGA Japan. Not great in retropect, but still a part of the history of Sonic.