So I've been wanting to do a run like that for a minute now, but there's no category like it, so I was wondering if it ever was discussed to be made?

I was thinking maybe Cyberspace Challenge+Remix Stages as the run, and you do the four island Cyberspace Challenge, then you hop into Final Horizons and do the DLC stages in order from A to I. I guess timing could be IGT for the first part and JUST Cyberspace IGT for the second part? That's where I'm kinda stumped, I guess. It's just annoying that they weren't put into Arcade Mode or Cyberspace Challenge already.

I don't think there'll be any changes until sega adds additional stages to arcade mode...

If they do, since I dunno if they plan on any more updates

We likely won't add much since it would be an unofficial category, maybe best suited for category extensions given enough interest. It would be very awkward to implement though due to the nature of the remix levels.

There is a mod that adds them to Arcade mode (https://gamebanana.com/mods/471738) so maybe this could be used for now? The only issue with this mod is that it lacks sound effects for the remix specific gimmicks, as well as some levels not saving your best time, it seems.

Oh neat, there's a code for this mod now in HMM!