If nothing says "early 90s" like MC Hammer, then nothing says "mid 90s" like shitty Sega CD games. How wonderful the two could come together, then, in Hammer vs. Evil D. in Soulfire, a game that looked as awful as it sounded.
It was never released, sadly/thankfully, and before you go making jokes about developers GTE, know they did some cool stuff with Sega (like pioneering 3D title Time Traveler) and made some decent PC games as well (like Timelapse).
Maybe the problem here is that there was no "time" in Hammer's game title. Which, you know. Irony.